The cost of petrol - Math Central

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Question from Sam, a student:

Hi, i'm confused about this question from my textbook, here goes:
The cost of petrol for a 240 km journey for a car which runs 12 km on each litre of petrol is $24. What would be the cost of petrol for a 500 km journey for a van which runs 11km on each litre of petrol?
please answer in detail and thanks in advance :)

Hi Sam,

The car runs 12 km on each litre of petrol. How many litres does it take to go 240 km? Petrol costs $24 for this 240 km trip so what is the cost of petrol in dollars per litre?

The van runs 11 km on each litre of petrol. How many litres does it take to go 500 km? How much does it cost to purchase this much petrol?

Penny

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