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The speed of a boat in still water is 15...

The speed of a boat in still water is 15 km/h. The speed of the current is 3 km/h. In how much time (in hours) will the boat travel a distance of 54 km upstream and the same distance downstream?
स्थिर जल में किसी नाव की चाल 15 किमी/घंटा है | धारा की चाल 3 किमी/घंटा है | यह नाव धारा के प्रतिकूल 54 किमी तथा धारा के अनुकूल इतनी ही दूरी कितने समय (घंटे में ) में तय करेगी ?

A

`7 1/2`

B

7

C

6

D

`6 1/2`

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The speed of a boat in still water is 12 km/h. If the boat covers a distance of 38 km upstream in 4 hours, then the speed of the stream (in km/h) is:

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PINNACLE-BOAT & STREAM-EXERCISE
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  4. A man can row a boat in still water at a speed of 5 m/s. He covers a s...

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  5. A boat goes at 20 km/h up stream and at 30 km/h down the stream. What ...

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  6. A boat can go 10 km upstream and 20 km downstream in 7 hours. It can g...

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  7. A boat takes 45 minutes to go 3 km upstream and 4 1/2 km downstream wh...

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  8. The speed of a boat in still water is 15 km/h. The speed of the curren...

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  9. A boat goes a distance of 4 km upstream in 2 hours and the same distan...

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  10. Abhi rows upstream a distance of 28 km in 4 hours and rows downstream ...

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  11. The speed of boat in still water is 18 km/h and the speed of the curre...

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  12. A man can row a distance of 900 meters against the stream in 12 minute...

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  13. A boat can go 3 km upstream and 5 km downstream in 55 minutes. It can ...

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  14. The time taken by a boat to travel 13 km downstream is the same as tim...

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  15. A boat can go 3.6 km upstream and 5.4 km downstream in 54 minutes, whi...

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  16. In a stream running at 3 km/h, a motorboat goes 12 km upstream and bac...

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  17. A boat covered a distance of 15 km upstream in 5 hours and a distance ...

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  18. A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour ...

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  19. A boat can go 5km upstream and 7 1/2km downstream in 45 minutes. It ca...

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  20. The speed of a boat in still water is 15 km/h, and the speed of the cu...

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