Answer:
Given: Mass of fuel = 4.5 kg The heat produced by combustion of 4.5 kg of fuel \[=\text{ }1,\text{ }80,\text{ }000\text{ }kJ\] So, the calorific value of fuel = Heat produced by combustion of 1 kg of fuel \[=\,\,\frac{1,\,80,\,000}{4.5}\] \[=40,000\text{ }kJ/kg.\]
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