The ratio of speed of boat in still water to speed of stream is 8 : 1. It takes 4 hours by boat to cover 54 km in downstream & 42 km in upstream. Find the downstream speed of boat.

The ratio of speed of boat in still water to speed of stream is 8 : 1.

1.	The ratio of speed of boat in still water to speed of stream is 8 : 1. It takes 4 hours by boat to cover 54 km in downstream & 42 km in upstream. Find the downstream speed of boat.
A.	25 kmph
B.	24 kmph
C.	21 kmph
D.	27 kmph
E.	23 kmph
Answer» E. 23 kmph

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