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The fuel charges for running a train are...

The fuel charges for running a train are proportional to the square of the speed generated in km/h, and the cost is Rs . 48 at 16 km/h . It the fixed charges amount to Rs. 300/h , the most economical speed is

A

`60 km//h`

B

`40 km//h`

C

`48km//h`

D

`36 km//h`

Text Solution

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The correct Answer is:
B
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