a motor boat covers a certain distance downstream in a river in 3 hour | Examsbook

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Q:
A motorboat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half an hour. If the speed of the water is 1.5 km / h, then the speed of the boat in still water is:

1
19.5 km/h
2
19 km/h
3
17 km/h
4
17.5 km/h

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Answer : 1. "19.5 km/h"

Maths Boats and Streams Problem

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