1.

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)?

Answer»

15
3
24
21

Solution :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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