Q. |
The price of diesel increases from ₹ 60 per litre to ₹ 80 per litre. By what percent must a diesel car owner decrease the consumption so as to keep the same expenditure on diesel? |
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A. 50% |
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B. 20% |
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C. 33.33% |
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D. 25% |
Increase in price = ₹80 - ₹ 60 = ₹20
Increase in fraction = 20/60 = 1/3
Apply the line method.
1/3 going down becomes 1/4 =25%