Question
The price of an LPG cylinder increases from Rs.688 to Rs.860. By what percent should consumption be reduced so that the expenditure on LPG cylinders does not change? (in %)
This question was previously asked in
RPF Constable 2018 Question Paper PDF (16-Feb-2019) (Shift 2)
The correct answer is
20
20 is correct.
To keep the expenditure unchanged, the cut in consumption equals the rise in price divided by the new price, multiplied by 100.
Rise in price \(=860-688=172\) and the new price is ₹860.
Reduction in consumption \(=\dfrac{172}{860}\times 100=20\%\).
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