The price of petrol is increased by 25%. By how much per cent a car owner should

Question

The price of petrol is increased by 25%. By how much per cent a car owner should reduce his consumption of petrol so that the expenditure on petrol would not be increased ?

Options:

A . 20%

B . 30%

C . 25%

D . 50%

Answer: Option A
Answer: (a)
Using Rule 8,
Required per cent = ${25 × 100}/125 = 20%$

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