Question 64

A person used to get 15 litres of petrol for a certain amount but due to the hike in the price he is getting one litre less for the same amount What is the percentage rise in the petrol price ?

Solution

Let the amount that is fixed be 210 Rupees

He used to get 15 litres of petrol for Rs. 210 earlier and then only 14 litres.

Initial cost of petrol = 210/15 = 14 Rs

Final cost of petrol = 210/14 = 15 Rs.

% rise in petrol price = 100/14 = $$ 7 \frac {1}{7}$$

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