Multiple choice

The price of the petrol is increased by 19% and Sunita intended to spend only an additional 12% on petrol. By what percent should she reduce the quantity of petrol purchased ( nearest to integer)

  1. 7

  2. 6

  3. 5

  4. 8
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When price increases by 19%, new price = 1.19 × original. To spend only 12% more, new spend = 1.12 × original spend. Let new quantity be q': 1.19P × q' = 1.12P × q, so q' = 1.12/1.19 ≈ 0.941. Reduction = 1 - 0.941 = 0.059 or 5.9% ≈ 6%.

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