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- Question
- A person goes to his office from his home at the speed of 4 km/h and return back at the speed of 6 km/h. Find the average speed of the person?
Options- A. 4.5 km/h
- B. 5 km/h
- C. 10 km/h
- D. 4.8 km/h
- Correct Answer
- 4.8 km/h
ExplanationAverage speed = 2ab/(a+b)
= (2 x 4 x 6)/(4 + 6)
= 48/10
= 4.8 km/h - 1. A boat moves downstream at 1 km in 5 minutes and upstream at 1 km in 12 minutes.What is the speed of current?
Options- A. 4.5 km/h
- B. 3.5 km/h
- C. 2 km/h
- D. 2.5 km/h Discuss
- 2. A man takes 4 h 20 min in walking to a certain place and riding back. If he walk on both sides he losses 1 h. The time he would take by riding both ways is?
Options- A. 2 h 20 min
- B. 3 h 20 min
- C. 2 h
- D. 4 h 40 min Discuss
- 3. If a motor car covers a distance of 250 m in 25 second, What is its speed in kilometer per hour?
Options- A. 36.5
- B. 36.8
- C. 37
- D. 36 Discuss
- 4. A train is running with the speed of 45 km/hour. What is its speed in meter per second?
Options- A. 12.5
- B. 13.5
- C. 20.5
- D. None of these Discuss
- 5. By walking at 3/4 of his usual speed , a man reaches his office 20 minutes later than usual . this usual time is?
Options- A. 30 minutes
- B. 60 minutes
- C. 75 minutes
- D. 1 hour 30 minutes Discuss
- 6. If a person travel 39 km at a speed of 26 km/h, another 39 km at a speed of 39 km/h and 39 km again at a speed of 52 km/h . Then find the average speed of entire journey
Options- A. 35 km/h
- B. 35 km/h
- C. 36 km/h
- D. 40 km/h Discuss
- 7. If speed of 3 1/ 3 m/s is converted to km/h, then it would be
Options- A. 8 km/h
- B. 9 km/h
- C. 10 km/h
- D. 12 km/h Discuss
- 8. A car covers 300 km 15 h. Find the speed of the car?
Options- A. 20 km/h
- B. 25 km/h
- C. 15 km/h
- D. 24 km/h Discuss
- 9. 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
- 10. 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
Time and Distance problems
Search Results
Correct Answer: 3.5 km/h
Explanation:
Sd = 12 km/h
Su = 5 km/h
Speed of current = (12 - 5)/2 = 3.5 km/h
Correct Answer: 3 h 20 min
Explanation:
W + R = 4 h 20 min
W + W = 5 h 20 min
? R + R = 3 h 20 min
Correct Answer: 36
Explanation:
Speed of the motor car in meter per second = 250 / 25
= 10 m/s
Speed in km/hr = (18/5) x speed in m/s
= 10 x (18 / 5) km/hour
=36 km/hour.
Correct Answer: 12.5
Explanation:
speed of a train in kilometer per hour =45
Speed in meter per second = ( 5/18 ) x Speed in kilometer per hour
= 45 x 5/18
= 12.5 kmph
Correct Answer: 60 minutes
Explanation:
At 3/4 of the usual speed, the time taken is 4/3 of the usual time
? 4/3 of usual time - usual time = 20 min
? 4x/3 - x = 20
? x/3 = 20
? x = 60 min.
Correct Answer: 36 km/h
Explanation:
Average speed of entire journey
= (39 + 39 + 39)/(39/26 + 39/39 +39/52)
= 3/(1/26 + 1/39 +1/52)
= 3/[(6 + 4 + 3)/156]
= 3 x 156/13 = 36 km/h
Correct Answer: 12 km/h
Explanation:
? 1 m/s = 18/5 km/h
? 31/3 m/s = 10/3 m/s = (10/3) x (18/5) km/h
= 12 km/h
Correct Answer: 20 km/h
Explanation:
We know that, speed = Distance / Time
? Required speed = 300/15 =20 km/h
Correct Answer: 23 km/h
Explanation:
Required speed = Distance/ Time
= 690/30
= 23 km/h
Correct Answer: 296 km
Explanation:
We know that, Speed = Distance / Time
? Required distance = Speed x Time
= 37 x 8 = 296 km
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