A car is driven along a level road.the total energy put from The petrol is 60 kJ and the car wastes 45kJ of energy what is The efficiency of car?
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Answer:25%
Explanation:If 45 out of 60 is wasted, that’s 3/4.
if 3/4 is wasted, then 1/4 is used.
Another way of saying 1/4 is 25%
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