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A boat running downstream covers a dista...

A boat running downstream covers a distance of 10 km in 2 h. While coming back stream the boat takes 5 h to cover the same distance. If the speed of the current is `1.5` km/h. what is speed of the boat in still water?
(A) `2.5` km/h (B) `3.5` km/h (C) `5.3` km/h (D) `4.3` km/h

A

C

B

A

C

D

D

B

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