Question

Sumit can swim 12 km upstream and 16 km downstream in 5 hours. If ratio of speed of stream to that of speed of Sumit in upstream is 1:2, then find the speed of Sumit in still water.

A 6 km/hr
B 5 km/hr
C 4 km/hr
D 8 km/hr
E 7 km/hr
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