The speed of a boat in still water is 5 km/hr and the speed of the stream is 2 km/hr. Find the distance that can be rowed by the boat in 4 hours. If:
(i) the boat is rowed upstream,
(II) the boat is rowed downstream.
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The speed of the boat is 5km/hr in still water...
The speed of the stream is 2km/hr...
Hence the speed of boat when rowed upstream is ( 5 - 2 ) km/hr = 3km/hr
Hence the speed of boat when rowed downstream is ( 5 + 2 ) km/hr...
(I) 3 ×4 = 12 km
(ii) 7× 4 = 28 km
This is your required answer
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