Question

a) If a fuel has a calorific value of 30,000 kJ/kg, what amount of fuel is to be burnt to
produce about 90,000 kJ of energy.
Plzz help ​

Answer 1

Given calorific value of fuel = 30,000 KJ/kg

This means to burn 1 kg of fuel, 30,000 KJ of heat energy is required.

Let the fuel burnt for 90,000 kg be x kg.

For 1 kg fuel => 30,000 KJ Energy

For x kg fuel => 30,000 × x KJ energy.

=> 30,000 × x = 90,000

=> x = 3

It is clear for 90,000 KJ energy, 3 kg fuel is burnt.

Hope, this helps you.

Answer 2

Answer:

Hiii dear good afternoon