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A boat takes two hours to travel 8 km an...

A boat takes two hours to travel 8 km and back in still water. If the velocity of water is 4 km/h, the time taken for going upstream 8 km and coming back is

A

160 minutes

B

80 minutes

C

100 minutes

D

120 minutes

Text Solution

Verified by Experts

The correct Answer is:
A
Velocity of boat `= (8 + 8)/(2) = 8km h^(-1)`
Velocity of water `= 4km h^(-1)`
`t= (8)/(8-4) + (8)/(8+4) = (8)/(3) h= 160` minute
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DISHA PUBLICATION-MOTION IN A STRAIGHT LINE-Exercise-1
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