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The time taken by a boat to travel 13 km...

The time taken by a boat to travel 13 km downstream is the same as time taken by it to travel 7km upstream. If the speed of the stream is 3km/h, then how much time(in hours) will it take to travel a distance of 44.8 km in still water? /
धारा के अनुकूल 13 किमी की दूरी तय करने में एक नाव को लगने वाला समय धारा के प्रतिकूल 7 किमी की दूरी तय करने में इसे लगने वाले समय के बराबर है | यदि धारा की चाल 3 किमी/घंटा है, तो स्थिर जल में इसे 44.8 किमी की दूरी तय करने में कितना समय ( घंटे में ) लगेगा ?

A

`4 12/25`

B

`5 3/5`

C

`5 2/5`

D

`4 13/25`

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The speed of a boat in still water is 6 km/h. Time taken by the boat to cover a certain distance upstream is 3 hours more than the time taken to cover the same distance downstream. If the speed of the stream is 2 km/h, then what is the total distance, upstream and downstream, covered by the boat? स्थिर जल में किसी नाव की चाल 6 किमी/घंटा है | धारा के विपरीत किसी निश्चित दूरी को तय करने में नाव को लगने वाला समय धारा के अनुकूल इसी दूरी को तय करने में लगने वाले समय से 3 घंटा अधिक है | यदि धारा की चाल 2 किमी/घंटा है, तो नाव के द्वारा धारा के विपरीत तथा धारा के अनुकूल तय की गयी कुल दूरी ज्ञात करें |

A boat take 6 hours to travel 36 km downstream and 24 km upstream. It take 9 hours to travel 48 km downstream and 40 km upstream. Find the speed of the stream and that of boat in still water.

Knowledge Check

  • The time taken by a boat to travel 13 km downstream is the same as time taken by it to travel 7 km upstream. If the speed of the stream is 3 km/h, then how much time (in hours) will it take to travel a distance of 44.8 km in still water?

    A
    `4(12)/(25)`
    B
    `5(2)/(5)`
    C
    `5(3)/(5)`
    D
    `4(13)/(25)`

  • The speed of a boat in still water is 18 km/h and the speed of the current is 6 km/h. In how much time (in hours) will the boat travel a distance of 90 km up stream and the same distance downstream ?

    A
    `9 1/2`
    B
    `11 1/4`
    C
    `12`
    D
    `10`

  • A boat can travel 9.6 km downstream in 36 min . If speed of the water current is 10% of the speed of the boat in downstream . How much time will boat take to travel 38.4 km upstream .

    A
    2 hours
    B
    3 hours
    C
    1.25 hours
    D
    1.5 hours

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