Discussion
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- Question
- A speed of 55 m / sec. is the same as?
Options- A. 198 km/hr.
- B. 11 km/hr.
- C. 15 5/18 km/hr.
- D. 275 km/hr.
- Correct Answer
- 198 km/hr.
ExplanationSpeed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = ( 55 x 18 /5 ) km/hr
= 198 km/hr. - 1. A speed of 22.5 m/sec. is the same as?
Options- A. 40.5 km/hr.
- B. 81 km/hr.
- C. 36.8 km/hr .
- D. 72 km/hr. Discuss
- 2. A and B are two towns. Mr. Faruqui covers the distance from A to B on cycle at 16 km/hr. however, he cover the distance from B to A on foot at 9 km/hr. his average speed during the whole journey is?
Options- A. 12.5 km/hr.
- B. 10.25 km/hr.
- C. 11.52 km/hr.
- D. 12.32 km/hr. Discuss
- 3. A man crosses a streets 600 m long in 5 minutes. His speed in km per hour is?
Options- A. 7.2
- B. 3.6
- C. 10
- D. 8.4 Discuss
- 4. if a man cover 10.2 km. in 3 hours. The distance covered by him in 5 hours is?
Options- A. 18 km.
- B. 15 km.
- C. 16 km.
- D. 17 km. Discuss
- 5. A train is moving with a speed of 92.4 km/hr. how many meters will it cover in 10 min.?
Options- A. 1540
- B. 15400
- C. 154
- D. 15.4 Discuss
- 6. A speed of 30.6 km/hr. is the same as?
Options- A. 5.1 m/sec.
- B. 8.5 m/sec.
- C. 110.16 m/sec.
- D. 1.7 m/sec. Discuss
- 7. A speed of 36 km/hr. is the same as?
Options- A. 10 m/sec.
- B. 7.2 m/sec.
- C. 2 m/sec.
- D. 129.6 m/sec. Discuss
- 8. Suresh started cycling along the boundaries of a square field from corner point A. After half an hour, he reached the corner point C, diagonally opposite to A, if his speed was 8km/hr , what is the area of the field in square km.?
Options- A. 64
- B. 8
- C. 4
- D. Cannot be determined Discuss
- 9. A man goes uphill with an average speed of 35 km/hr, and covers down with an average speed of 45 km/hr. The distance travelled in both the cases being the same , the average speed for the entire journey is?
Options- A. 38 3/8 km/hr.
- B. 39 3/8 km/hr.
- C. 40 km/hr
- D. None of these Discuss
- 10. If a boy takes as much time in running 10 m as a car takes in covering 25 m, the distance covered by the boy during the time the car covers 1 km, is?
Options- A. 400 m.
- B. 40 m.
- C. 250 m.
- D. 650 m. Discuss
Time and Distance problems
Search Results
Correct Answer: 81 km/hr.
Explanation:
Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (22.5 x 18 /5 ) km/hr
= 81 km/hr.
Correct Answer: 11.52 km/hr.
Explanation:
Average Speed = Total distance / time
= 2d / [( d / 16) + ( d / 9)]
= ( 2 x 16 x 9 ) / ( 16 + 9 ).
= 11.52 km/hr.
Shortcut :
Average speed = 2uv / (u + v)
= ( 2 x 16 x 9 ) / ( 16 + 9 )
= 11.52
Correct Answer: 7.2
Explanation:
Speed = 600 / (5 x 60) m/sec.
= 600 / (5 x 60) x 18/5 km/hr.
= 7.2 km/hr.
Correct Answer: 17 km.
Explanation:
Speed = 10.2 / 3 km/hr.
= 3.4 km/hr.
Distance covered in 5 hours = 3.4 X 5 km.
= 17 km
Correct Answer: 15400
Explanation:
Speed in m/sec = ( 5 / 18 ) x Speed in kms/hr.
92.4 kms/hr = 92.4 x (5 / 18) m/sec.
? Req. distance = 92.4 x ( 5 / 18 ) x 600 meters
= 15400 m.
Correct Answer: 8.5 m/sec.
Explanation:
Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 30.6 x 18 /5 ) m/sec
= 8.5 m/sec
Correct Answer: 10 m/sec.
Explanation:
Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 36 x 5/18 ) m/sec
= 10 m/sec
Correct Answer: 4
Explanation:
Length of two sides of square
= 8 x 1/2 km.
= 4 km.
? Area of the field = 2 x 2 sq. km
= 4 sq. km.
Correct Answer: 39 3/8 km/hr.
Explanation:
Average speed = 2uv / (u + v)
= ( 2 x 35 x 45) / (35 + 45) km/hr.
= 39 3/8 km/hr
Correct Answer: 400 m.
Explanation:
Let distance covered by boy is Y.
Then, 25 : 10 : : 1000 : Y
? Y = (10 x 1000)/25 = 400 m
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