Question

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

Answer 1

Answer:

100/11 %

Step-by-step explanation:

let price was 100 rs per litre

consumption = 1 Lt

expenditure =100

new rate = 110

petrol use = 100/110.

percentage use reduce. = ( 1- 100/110) *100

= 1000/110

=100/11 %

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