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A takes 30 minutes more than B to cover ...

A takes 30 minutes more than B to cover a distance of 15 km at a certain speed. But if A doubles his speed, he takes one hour less than B to cover the same distance. What is the speed (in km/h) of B?
A को एक निश्चित चाल से 15 किमी की दूरी तय करने में B से 30 मिनट अधिक लगते हैं | लेकिन यदि A अपनी चाल दोगुनी कर ले, तो उसे इसी दूरी को तय करने में B से एक घंटा कम लगेगा |B की चाल ( किमी/घंटा में ) ज्ञात करें |

A

6

B

5

C

`6 1/2`

D

`5 1/2`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A takes 6 hours more than B to cover a distance of 60 km. But if A doubles his speed, he takes 3 hours less than B to cover the same distance. The speed (in km/hr) of A is:

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    `4 (2)/(3)`
    C
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