Question

The price of petrol goes up by 10% .By how much per cent must a motorist reduce the consumption of petrol so that the expenditure on it remains unchanged?

Answer 1

Let his old expenses on petrol= X
Now his new expenses on petrol= X+10% of X
= 11X/10
But Reduction in consumption.. so the expenses should remain same= 11X/10-X
= X/10
So Reduction Percentage= (X-10)/ 11X/10 *100
= 100/11
=9.111111% or 9 1/11

Answer 2

Answer:

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Step-by-step explanation:

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