Ans. Suppose the speed of boat in still water is x km/h and speed of stream is y km/h
Speedof boat in downstream = (x + y) km/h x+ y = 32 ?(i)
Speed of boat in upstream = (x ? y) km/h
x ? y = 28 ?(ii)
Add. Eqs. (i) and (ii), we get 2x = 60
x = 30 km/h
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