69.In
a river flowing at 2 km/hr, a boat travels 32 km upstream and then returns
downstream to the starting point. If its speed in still water be 6 km/hr, find
the total journey time.
[A]
16 hours
[C]
14 hours
[B]
12 hours
[D]
None of these
Answer : [B]
Explanation :
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Let
the total journey time be t hr.
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