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- Question
- Two cars are moving in the same direction with their respective speeds of 9 km/h and 5 km/h. Find the relative speed of 1st car with respect of 2nd.
Options- A. 2 km/h
- B. 4 km/h
- C. 8 km/h
- D. 6 km/h
- Correct Answer
- 4 km/h
ExplanationWe know that for relative speed, the subtraction of speeds takes place, if the motions of the two objects are in the same direction.
? Required relative speed = 9 - 5 = 4 km/h - 1. Ram and Shyam are moving in the directions opposite to each other. The Speeds of both persons are 10 km/h and 6 km/h, respectively. Find the speeds of Ram with respect of Shyam.
Options- A. 6 km/h
- B. 16 km/h
- C. 4 km/h
- D. 8 km/h Discuss
- 2. The speed of a bus is 72 km/h. The distance Covered bye the bus in 5 s is
Options- A. 50 m
- B. 74.5 m
- C. 100 m
- D. 60 m Discuss
- 3. A bus covers a distance of 400 km with a speed of 20 km/h. What time is taken by the bus to cover this distance?
Options- A. 25 h
- B. 5 h
- C. 21 h
- D. 20 h Discuss
- 4. A bus is running with a uniform speed of 37 km/h. What distance will be covered by bus in 8 h?
Options- A. 246 km
- B. 289 km
- C. 296 km
- D. 276 km Discuss
- 5. A car covers a distance of 690 km in 30 h. What is the average speed of the car?
Options- A. 25 km/h
- B. 23 km/h
- C. 20 km/h
- D. 18 km/h Discuss
- 6. A man covered a distance of 12 km in 90 min by cycle. How much distance will he cover in 3 h, if he rides the cycle at a uniform speed?
Options- A. 36 km
- B. 24 km
- C. 30 km
- D. 27 km Discuss
- 7. Two trains A and B travel from points X to Y and the ratio of the speeds of A to that of B is 2 : 7. Find the ratio of time taken by A and B to reach From X to Y.
Options- A. 2 : 5
- B. 3 : 5
- C. 3 : 8
- D. 7 : 2 Discuss
- 8. A man completes 30 km of a journey at 6 km/h and the remaining 40 km of the journey in 5 h. Find the average speed for the whole journey.
Options- A. 64/11 km/h
- B. 7 km/h
- C. 71/2
- D. 8 km/h Discuss
- 9. A certain distance is covered at a certain speed. If half of the distance is covered in double time, the ratio of the two speeds is .
Options- A. 4 : 1
- B. 1 : 4
- C. 1 : 2
- D. 2 : 1 Discuss
- 10. Moving 6/7 of its usual speed a train is 10 min late. Find its usual time to cover the journey.
Options- A. 25 min
- B. 15 min
- C. 35 min
- D. 60 min Discuss
Time and Distance problems
Search Results
Correct Answer: 16 km/h
Explanation:
We know that for relative speed, the two speeds will be added, if the motions of the two objects are in opposite directions.
? Required speed = 10 + 6 = 16 km/h
Correct Answer: 100 m
Explanation:
Given, speed of bus = 72 km/h = 72 x 5/18 = 20 m/s
? Distance travelled in 5 s = 5 x 20 = 100 m
Correct Answer: 20 h
Explanation:
We know that, speed = Distance / Time
? Required Time = Distance / Speed = 400/20 = 20 h
Correct Answer: 296 km
Explanation:
We know that, Speed = Distance / Time
? Required distance = Speed x Time
= 37 x 8 = 296 km
Correct Answer: 23 km/h
Explanation:
Required speed = Distance/ Time
= 690/30
= 23 km/h
Correct Answer: 24 km
Explanation:
We know that, speed = Distance / Time
Speed = 12/90 km/min
? Distance covered in 3 h = Speed x Time
= (12/90) x (3 x 60) = 24km
Correct Answer: 7 : 2
Explanation:
We know that speed is inversely proportional to time.
Given that, (Speed of A ) : (speed of B ) = 2 : 7
?(Time taken by A ) : (Time taken by B ) = 1/2 : 1/7 = 7 : 2
Correct Answer: 7 km/h
Explanation:
Total distance = 30 + 40 = 70 km
Total time taken = (30/6) + 5 = 10 h
? Required average speed = 70/10 = 7 km/h
Correct Answer: 4 : 1
Explanation:
Let L km distance be covered in T h. So, speed in first case = L/T km/h.
And speed in second case = (L/2)/2T = L/4T km/h
? Required ratio = L/T : L/4T =1 : 1/4 = 4 : 1
Correct Answer: 60 min
Explanation:
New speed = 6/7 of usual speed
Now, time taken = 7/6 of usual time
(7/6 of the usual time) - (usual time) = 10 min
? 1/6 of the usual time = 10 min
? Usual time = 60 min
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