Question

If my car uses 1 litre of petrol every 10 km, how many litres will I need to go 105km?

Answer 1

Answer:

10 km --- 1 litre

1km --- 0.1 litre

105 km --- 0.1*105=10.5 litres

Correct answer is 10.5 litres of petrol

Answer 2

Petrol needed to travel 10km= 1 litre

Therefore, Petrol needed to travel 1 km= 1litre/10km

Therefore, Petrol needed to travel 105 km= (1litre×105 km)/10km

=21/2 litre

Therefore, answer is 21/2 or 10.5 litre

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