The fuel charges for running a train are proportional to the square of the speed generated in km/h,
Channel: Doubtnut
Date: 2020-06-28

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. If the fixed charges amount to Rs. 300/h, the most economical speed is (a) 60 km/h (b) 40 km/h 48 km/h (d) 36 km/h