Discussion of Question with ID = 089 under Boats-and-Streams

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The speed of a boat in still water is 12 km/h and rate of flow of the stream is 4 km/h. If it travels upstream for 6 hours, what is the distance travelled by the boat during the journey?


48 km.


49 km.


47 km.


51 km.

Ans: a

The effective speed of the boat in the stream is 12 - 4 = 8 km/h. The distance is speed × time = 8 × 6 = 48 km.

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