Question

the calorific value of coal is 72000 Kilo joule per kg find out the amount of coal required to produce heat energy of 36000 kilo Joule​

Answer 1

Answer:

Let amount of coal be X

Since 1kg = 72000 kj

So we need 36000 kj

Therefore,

1/2 kg = 36000 kj

So amount of coal or X = 1/2 kg of 500 g