Question

In the new budget, the price of petrol rose by 10%. By how much percent must one reduce the consumption so that the expenditure does not increase​

Answer 1

Answer

Let price of petrol be Rs.100.

After increasing,

Price of petrol =100+

100

10

×100=Rs.110

Now, to keep same expenditure, the consumption should be reduced by x%(say).

Now,

x=

110

110−100

×100

⇒x=

110

10

×100≈9%

Hence, to keep same expenditure, the consumption should be reduced by 9%.

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HOPE I AM CLEAR.

WARM REGARDS.

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