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A boy walks 15 m in 7 seconds and then w...

A boy walks 15 m in 7 seconds and then walks back in 5 seconds. His average speed (in m/s) is:
एक लड़का 7 सेकंड में 15 मीटर चलता है तथा फिर 5 सेकंड में वापस आ जाता है | उसकी औसत चाल (मीटर/सेकंड में ) ज्ञात करें |

A

6

B

2.5

C

3.25

D

4

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  6. At the speed of 5 km/h a girl, walks from her home to school in 24 min...

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  7. A boy goes from his home to the park 500 m away in 5 minutes and comes...

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  8. A person completes 210 km of his journey at 60 km/h and completes the ...

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  9. A train of length 230m has to cross a platform of length 750m. If trai...

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  10. A travels 15 km with a speed of 30 km/h. He travels another 25 km with...

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  11. A car can cover 300 meters in 6 minutes. What is its average speed in ...

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  12. A train crosses a 600 metres long platform in 50 seconds. It crosses a...

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  13. A train leaves P at 9 am with speed of 30 km/h. Another train leaves Q...

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  14. Alok starts walking from P with speed of 6 km/h towards Q. Raman start...

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  15. A train crosses a 900 meter long platform in 300 seconds. If the lengt...

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  16. A travels a certain distance with three different speeds, first covers...

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  17. A train takes 1 minute to cross a stationary pole. How long (in second...

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  18. The average speed of a car is 600 m / min. How much slower does the ca...

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  19. A car can cover a distance of 18 km in 24 minutes. The speed of a bus ...

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  20. A train crosses a stationary pole in 3 minutes. it crosses the 600 met...

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