Question

A car driven along a level rod the total energy input from the petrol is 60 kj in the car wastes 45 kj of energy what is the efficiency of the car​

Answer 1

Answer:

mate effiency is {final/inital } * 100

so  15 is left so {15/60} *100

=0.25*100

=25%   is the effiency

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Answer 2

Answer:

Explanation:

60-45=15kj

we know that

efficiency is (final -initial)/final*100

-15/60*100

-.25*100

-25%is the efficiency