If the price of petrol be raised by 20%, then the percentage by which a car owne

Question

If the price of petrol be raised by 20%, then the percentage by which a car owner must reduce his consumption so as not to increase his expenditure on petrol is

Options:

A . 15$1/3$%

B . 16$2/3$%

C . 16$1/3$%

D . 15$2/3$%

Answer: Option B
Answer: (b)
Using Rule 8,
Percentage decrease in the consumption of petrol
= $(20/{100 + 20} × 100)$%
= $50/3 = 16{2}/3$%

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