Question

A boatman rows 216 km upstream in 6 hours and 432 km

Upstream speed 216 6 36 kmh Downstream speed 432 6 72 kmh Speed in still water 36 72 2 54 kmh Required time 324 54 6 hours

downstream in 6 hours. How long will it take to row 324 km in still water?

A 4 hrs

B 5 hrs

C 6 hrs

D 8 hrs

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Solution