![By an engine the consumption of coal is directly proportional to the square of its velocity when velocity is 50 mile/hour then](https://www.gkseries.com/blog/wp-content/uploads/2024/03/By-an-engine-the-consumption-of-coal-is-directly-proportional-to-the-square-of-its-velocity-when-velocity-is-50-mile-hour-then.jpg)
By an engine the consumption of coal is directly proportional to the square of its velocity when velocity is 50 mile/hour then consumption is 18 kg. If cost of coal is 25 paise/kg and expenditure is 12.5 Rs/hour is another case. Then find the consumption in travelling 50 miles?
a) 93 kg
b) 80 kg
c) 75 kg
d) None of these
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2024/03/image-102-598x1024.png)