Question

15. A mixture of petrol and kerosene is used by a gardener for lawn mower. If the mixture
contain 85% petrol, how much kerosene is required for 18 1 of mixture?
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Answer 1

Given:

A mixture of petrol and kerosene, The mixture contains = 85 % petrol

To find:

Amount of kerosene required for 18 litre of mixture .

Solution:

Percentage of kerosene = 100% - 85% = 15%

Total amount of mixture = 18 litre

Amount of kerosene needed =

15% of mixture =$\frac{15}{100} \times 18 = \bold{2.7\: litre}$

Hence, 2.7 litre of kerosene is required for 18 litre of mixture.