Question

4kg of a fuel burns completely to produce 1,80,000 kj of heat. 2 kg of another fuel produces 1,00,000 ki of
heat. Compare their efficiency.
​

Answer 1

${\huge{\pink{\underbrace{\overbrace{\mathbb{\blue{ANSWER:-}}}}}}}$

Fuel efficiency is the another name of calorific value.

So we should compare the calorific value.

calorific value$=\frac{heat\:\:\:\:produced}{mass\:\:of\:\:fuel}$

1.

Calorific value=$\frac{180000kj}{4kg}$

                        = 45000kj/kg

2.

Calorific value=$\frac{100000kj}{2kg}$

                       = 50000kj/kg

Comparing

$\huge{=\frac{45000}{50000} }$

$\huge\boxed{\blue{0.9}}$

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