Question

total amount of heat produced by a fuel having calorific value of 30 kj/kg was found to be 60000 joules how much fuel was burnt?(a)2000 kg
(b)200kg
(c)20kg
(d)2kg

Answer 1

Here goes your answer1kj = 1000 joulesso 60kj = 60000 joulesso the amount of fuel burnt=30/x=60          (x is the fuel burnt)
1/x= 60/301/x= 2/1so we get x=2 that is 2kg But still check once more cuz i am not sure.