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A boat takes 60% more time to cover a ce...

A boat takes 60% more time to cover a certain distance in upstream than downstream. If speed of stream is 9 km/hr. Then in how much time it will cover 504 km in downstream.

A

10 hr

B

12 hr

C

`10 (1)/(2)` hr

D

`12 (1)/(2)` hr

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The correct Answer is:
A
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