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1. A driver of auto rickshaw makes a profit of 20% on every trip when he carries 3 passengers and the price of petrol is Rs. 30 a litre. Find the % profit for the same journey if he goes for 4 passengers per trip and the price of petrol reduces to Rs. 24 litres? (revenue per passenger is same)
Then, when price of petrol is reduced
Cost price become 60 and selling price = 160
Profit increased = 100%
Solution:
Assume the cost price = 100 and selling price = 120Then, when price of petrol is reduced
Cost price become 60 and selling price = 160
Profit increased = 100%