Discussion of Question with ID = 006 under Boats-and-Streams

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A boat has a downstream speed of 8 km/h and an upstream speed of 6 km/h. What is the speed of the boat in still water?


7 kmph.


8 kmph.


6 kmph.


10 kmph.

Ans: a

By the shortcut method, the speed of the boat in still water is average of downstream and upstream speeds. So the required speed = ${8 + 6}/2$ = 7 km/h.

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