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At 10% less than usual) speed (in still ...

At `10%` less than usual) speed (in still water), a boat covers 110 km downstream in 5 hrs. If the boat's usual speed (in still water) is `400%` more than the stream's speed, at what time will it cover 120 km upstream at its usual speed?

A

6 hrs

B

7 hrs 30 mins

C

8 hrs

D

8 hrs 30 mins

Text Solution

Verified by Experts

The correct Answer is:
B
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