Question

By an engine the consumption of coal is directly proportional to the square of its velocity.when velocity is 50 mile/ h coal consumption is 100 kg.if the cost of coal is 25p per kg

Answer 1

The amount of coal consumed when velocity is 50 miles /hour is :

100kg

The cost of coal is is 25p per Kg.

This will be :

100 × 25 = 2500

The cost of of the fuel is thus :

2500 p