SSC GD Constable 4 Feb 2025 Shift 2 Paper

Section: Elementary Mathematics

Question : 41 of 80

Marks: +1, -0

The price (per litre) of petrol increases by 60%. By what percent should its consumption be reduced such that the expenditure on it increases by 12% only?

Validate

Solution:

If price increases by

x \%

and expenditure increases by

y \%

, then required decrease in consumption

=\;{x-y}/{100+x} × 100 \%

Calculation:

\;\;{60-12}/{100+60} × 100

\;⇒ \;{48}/{160} × 100

\;⇒ 30 \%

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