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

320 minutes

D

180 minutes

Text Solution

Verified by Experts

The correct Answer is:

A

`V_(B)=(8+8)/2=8kmph`
`t=t_(1)+t_(2)=d/(v_(B)+v_(r))+d/(v_(B)-v_(r))`

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