Ratio of speed of boat in still water to speed of stream 8 : 1. 67.5 km is travelled downstream in 2.5 hours. Difference between speed of boat in still water and speed of stream?

Ratio of speed of boat in still water to speed of stream 8 : 1. 67.5 k

1.	Ratio of speed of boat in still water to speed of stream 8 : 1. 67.5 km is travelled downstream in 2.5 hours. Difference between speed of boat in still water and speed of stream?
A.	10 km/hr
B.	13 km/hr
C.	21 km/hr
D.	18 km/hr
E.	None of these
Answer» D. 18 km/hr

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Ratio of speed of boat in still water to speed of stream 8 : 1. 67.5 km is travelled downstream in 2.5 hours. Difference between speed of boat in still water and speed of stream?

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