Topic-wise Time & Distance MCQs for CDAC C-CAT preparation with answers and explanations.
Q1.
A train travels 360 km in 4 hours. What is its average speed?
A80 km/h
B90 km/h
C100 km/h
D85 km/h
Show Answer & Explanation
Correct Answer: B - 90 km/h
Speed = Distance/Time = 360/4 = 90 km/h.
Q2.
A car covers 480 km in 8 hours. How much time will it take to cover 600 km at the same speed?
A8 hours
B9 hours
C11 hours
D10 hours
Show Answer & Explanation
Correct Answer: D - 10 hours
Speed = 480/8 = 60 km/h. Time for 600 km = 600/60 = 10 hours.
Q3.
A man walks at 5 km/h for 6 hours and at 4 km/h for 8 hours. Find his average speed.
A4.5 km/h
B4.4 km/h
C4.7 km/h
D5 km/h
Show Answer & Explanation
Correct Answer: B - 4.4 km/h
Total distance = 30+32 = 62 km. Total time = 14 hrs. Avg = 62/14 approx 4.43 km/h.
Q4.
Two trains start from same place in same direction at 50 km/h and 60 km/h. After how many hours will they be 40 km apart?
A2 hours
B6 hours
C4 hours
D8 hours
Show Answer & Explanation
Correct Answer: C - 4 hours
Relative speed = 60-50 = 10 km/h. Time = 40/10 = 4 hours.
Q5.
A person travels 40 km at 8 km/h and another 40 km at 10 km/h. Find average speed for the entire journey.
A8.5 km/h
B9.5 km/h
C9 km/h
D8.89 km/h
Show Answer & Explanation
Correct Answer: D - 8.89 km/h
Total time = 5+4 = 9 hrs. Total distance = 80 km. Avg = 80/9 approx 8.89 km/h.
Q6.
A train 150m long crosses a platform of 200m in 35 seconds. Find the speed of the train.
A40 km/h
B36 km/h
C45 km/h
D50 km/h
Show Answer & Explanation
Correct Answer: B - 36 km/h
Total distance = 150+200 = 350m. Speed = 350/35 = 10 m/s = 36 km/h.
Q7.
A boat goes 30 km upstream and 44 km downstream in 10 hours. It goes 40 km upstream and 55 km downstream in 13 hours. Find speed of boat in still water.
A8 km/h
B7 km/h
C6 km/h
D9 km/h
Show Answer & Explanation
Correct Answer: A - 8 km/h
Let boat=b, stream=s. 30/(b-s)+44/(b+s)=10. 40/(b-s)+55/(b+s)=13. Solving: b=8.
Q8.
If a person walks at 3 km/h, he reaches his office 5 minutes late. If he walks at 4 km/h, he reaches 5 minutes early. What is the distance?
A2 km
B1 km
C3 km
D4 km
Show Answer & Explanation
Correct Answer: A - 2 km
Let distance = d. d/3 - d/4 = 10/60. d(4-3)/12 = 1/6. d = 2 km.
Q9.
Two trains 100m and 120m long are running in opposite directions. Their speeds are 36 km/h and 54 km/h. Time to cross each other?
A15 sec
B10 sec
C12 sec
D8 sec
Show Answer & Explanation
Correct Answer: D - 8 sec
Relative speed = 90 km/h = 25 m/s. Total length = 220m. Time = 220/25 = 8.8 approx 8 sec.
Q10.
A man can row at 5 km/h in still water. If the stream flows at 2 km/h, it takes him 2 hours to row to a place and back. How far is the place?
A4.2 km
B3.6 km
C4.8 km
D5.4 km
Show Answer & Explanation
Correct Answer: A - 4.2 km
Upstream = 3 km/h, Downstream = 7 km/h. d/3 + d/7 = 2. 10d/21 = 2. d = 4.2 km.
Q11.
A car covers first half of distance at 40 km/h and second half at 60 km/h. Average speed is:
A45 km/h
B50 km/h
C48 km/h
D52 km/h
Show Answer & Explanation
Correct Answer: C - 48 km/h
For equal distances: Average = 2×40×60/(40+60) = 4800/100 = 48 km/h.
Q12.
A train passes a pole in 15 seconds and a 300m platform in 25 seconds. Find length and speed of train.
A450m, 72 km/h
B300m, 72 km/h
C450m, 108 km/h
D400m, 96 km/h
Show Answer & Explanation
Correct Answer: C - 450m, 108 km/h
Let length = L. L/15 = (L+300)/25. 25L = 15L+4500. L = 450m. Speed = 450/15 = 30 m/s = 108 km/h.
Q13.
Walking at 3/4 of his usual speed, a man is 20 min late. Find his usual time.
A40 min
B80 min
C60 min
D100 min
Show Answer & Explanation
Correct Answer: C - 60 min
Time ∝ 1/Speed. New time = 4/3 of usual. 4T/3 - T = 20. T/3 = 20. T = 60 min.
Q14.
Two trains running in same direction at 40 km/h and 22 km/h. Faster train crosses a man in slower train in 36 sec. Length of faster train is:
Two cyclists start from same point at same time in opposite directions. Their speeds are 12 km/h and 8 km/h. After how many hours will they be 100 km apart?
A4 hours
B5 hours
C6 hours
D8 hours
Show Answer & Explanation
Correct Answer: B - 5 hours
Combined speed = 20 km/h. Time = 100/20 = 5 hours.
Q19.
A train 200m long takes 60 seconds to cross a bridge. Speed of train is 36 km/h. Length of bridge is:
A500m
B400m
C600m
D700m
Show Answer & Explanation
Correct Answer: B - 400m
36 km/h = 10 m/s. Total distance = 10×60 = 600m. Bridge = 600-200 = 400m.
Q20.
A person travels 120 km at 40 km/h and returns at 60 km/h. Average speed for round trip is:
A45 km/h
B50 km/h
C48 km/h
D52 km/h
Show Answer & Explanation
Correct Answer: C - 48 km/h
Time going = 3 hrs. Time return = 2 hrs. Total = 5 hrs. Distance = 240 km. Avg = 240/5 = 48 km/h.
Q21.
A car travels 240 km in 4 hours. Its speed in m/s is:
A18 m/s
B15 m/s
C20 m/s
D16.67 m/s
Show Answer & Explanation
Correct Answer: D - 16.67 m/s
Speed = 240/4 = 60 km/h = 60×5/18 = 16.67 m/s.
Q22.
A train 200m long passes a pole in 10 seconds. Its speed is:
A60 km/h
B72 km/h
C80 km/h
D54 km/h
Show Answer & Explanation
Correct Answer: B - 72 km/h
Speed = 200/10 = 20 m/s = 20×18/5 = 72 km/h.
Q23.
Two trains approach each other at 60 km/h and 40 km/h. They are 200 km apart. They meet in:
A3 hours
B2.5 hours
C2 hours
D1.5 hours
Show Answer & Explanation
Correct Answer: C - 2 hours
Relative speed = 100 km/h. Time = 200/100 = 2 hours.
Q24.
A man walking at 5 km/h reaches his office 10 minutes late. At 6 km/h he is 10 minutes early. Distance to office:
A15 km
B8 km
C12 km
D10 km
Show Answer & Explanation
Correct Answer: D - 10 km
D/5 - D/6 = 20/60. (6D-5D)/30 = 1/3. D = 10 km.
Q25.
A boat goes 24 km downstream in 3 hours and returns in 4 hours. Speed of stream is:
A2 km/h
B1 km/h
C1.5 km/h
D3 km/h
Show Answer & Explanation
Correct Answer: B - 1 km/h
Downstream speed=8, Upstream speed=6. Stream=(8-6)/2=1 km/h.
Q26.
If a person runs at 15 km/h instead of 10 km/h, he covers 20 km more in same time. Time is:
A2 hours
B3 hours
C5 hours
D4 hours
Show Answer & Explanation
Correct Answer: D - 4 hours
15t - 10t = 20. 5t = 20. t = 4 hours.
Q27.
A train 300m long crosses a bridge 200m long in 25 seconds. Speed is:
A90 km/h
B54 km/h
C72 km/h
D60 km/h
Show Answer & Explanation
Correct Answer: C - 72 km/h
Total distance = 500m. Speed = 500/25 = 20 m/s = 72 km/h.
Q28.
A car covers first half of distance at 40 km/h and second half at 60 km/h. Average speed is:
A48 km/h
B50 km/h
C45 km/h
D55 km/h
Show Answer & Explanation
Correct Answer: A - 48 km/h
Average = 2×40×60/(40+60) = 4800/100 = 48 km/h.
Q29.
Two runners start from the same point and run in the same direction at 8 km/h and 13 km/h. After how long will they be 20 km apart?
A5 hours
B3 hours
C4 hours
D2 hours
Show Answer & Explanation
Correct Answer: C - 4 hours
Relative speed = 5 km/h. Time = 20/5 = 4 hours.
Q30.
A cyclist covers 750 metres in 2 minutes 30 seconds. Speed in km/h:
A15 km/h
B18 km/h
C20 km/h
D12 km/h
Show Answer & Explanation
Correct Answer: B - 18 km/h
Speed = 750/150 = 5 m/s = 18 km/h.
Q31.
A man goes upstream 28 km in 4 hours and downstream 40 km in 4 hours. Speed of current:
A1.5 km/h
B2 km/h
C3 km/h
D2.5 km/h
Show Answer & Explanation
Correct Answer: A - 1.5 km/h
Upstream=7 km/h, Downstream=10 km/h. Current=(10-7)/2=1.5 km/h.
Q32.
A train crosses a standing man in 12 seconds and a platform of 200m in 22 seconds. Length of train:
Two trains of lengths 100m and 150m running in opposite directions cross each other in 10 seconds. If one is twice the speed of the other, find the slower train's speed:
A36 km/h
B30 km/h
C25 km/h
D45 km/h
Show Answer & Explanation
Correct Answer: B - 30 km/h
Total distance=250m. 250/10=25 m/s. S+2S=25. 3S=25. S=25/3 m/s. Slower=25/3×18/5=30 km/h.
Q42.
A person travels 600 km partly by train and partly by car. Train speed 80 km/h, car 60 km/h. Total time 8.5 hours. Train distance:
A400 km
B360 km
C480 km
D300 km
Show Answer & Explanation
Correct Answer: B - 360 km
Let train distance be x. Then x/80 + (600-x)/60 = 8.5. Multiplying by 240 gives 3x + 2400 - 4x = 2040, so x = 360 km.
Q43.
A boat takes 6 hours to go from A to B and 4 hours to return. If stream speed is 2 km/h, distance AB is:
A40 km
B36 km
C24 km
D48 km
Show Answer & Explanation
Correct Answer: D - 48 km
Downstream=D/4, Upstream=D/6. Stream=(D/4-D/6)/2=(D/12)/2=D/24=2. D=48 km.
Q44.
Speed of a car increases by 2 km/h every hour. If distance in first hour is 35 km, total distance in 12 hours:
A552 km
B492 km
C540 km
D480 km
Show Answer & Explanation
Correct Answer: A - 552 km
Speeds: 35,37,39...AP with a=35, d=2, n=12. Sum=n/2(2a+(n-1)d)=6(70+22)=6×92=552 km.
Q45.
A runs 5/4 times as fast as B. In a race of 1000m, A beats B by:
A150m
B250m
C200m
D300m
Show Answer & Explanation
Correct Answer: C - 200m
When A runs 1000m, B runs 1000×4/5=800m. A beats B by 200m.
Q46.
A bus covers a distance in 40 minutes at speed 60 km/h. To cover same distance in 30 minutes, speed should be:
A90 km/h
B75 km/h
C80 km/h
D70 km/h
Show Answer & Explanation
Correct Answer: C - 80 km/h
Distance = 60×40/60 = 40 km. Speed = 40/(30/60) = 80 km/h.
Q47.
If a man walks at 6 km/h, he reaches early by 10 min. If at 5 km/h, late by 5 min. The distance is:
A7.5 km
B6 km
C10 km
D5 km
Show Answer & Explanation
Correct Answer: A - 7.5 km
D/5 - D/6 = 15/60. (6D-5D)/30 = 1/4. D = 7.5 km.
Q48.
An express train takes 3 seconds to pass through a telegraph post and 12 seconds to pass through a platform 270m long. Length of train: