Ratio between speed of boat in still water to speed of stream is 7 : 2 – McqOptions

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1.	Ratio between speed of boat in still water to speed of stream is 7 : 2. If 126 km is travelled downstream in 3.5 hours then find the difference between speed of boat in still water to speed of stream(in kmph)?
A.	15
B.	22
C.	24
D.	20
E.	18
Answer» E. 18

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