The petrol price shot up by 10% as a result of the hike in crude oil prices. The price of petrol before the…
The petrol price shot up by 10% as a result of the hike in crude oil prices. The price of petrol before the hike was ₹90 per litre. A person travels 2200 km every month and his car gives a mileage of 16 km per litre. By how many km should he reduce his travel if he wants to maintain his expenditure at the previous level?
180 km
200 km
220 km
240 km
Solution
Old petrol used = $2200/16 = 137.5$ litres; old cost = $137.5\times90 = ₹12375$. New price = ₹99 per litre. To keep the same expenditure, new petrol budget = $12375/99 = 125$ litres, allowing $125\times16 = 2000$ km. Reduction in travel = $2200 - 2000 = 200$ km.