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Ratio between speed of yatch in still wa...

Ratio between speed of yatch in still water to speed of stream is `8:1`.if 67.5km is travelled downstream in 2.5 hours then find the differenec between speed of yatch in still water to speed of strem (in kmph)?

A

15

B

3

C

24

D

21

Text Solution

Verified by Experts

The correct Answer is:
D
Let speed of yatch in still water and speed of stream be `8x and x` respectively.
ATQ,
`(67.5)/(2.5)=8x+x`
`x=(27)/(9)`
`x=3`.
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