The length of a rectangle is increased by 20% and its breadth is decreased by 20%. What happens to its area?

A. It decreases by 4%

B. It does not change

C. It increases by 4%

D. It decreases by 2%

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cgl Save WhatsApp Report

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Answer: A. It decreases by 4%

Answer: (A) It decreases by 4%

Shortcut (successive change): \(a + b + \frac{ab}{100} = 20 - 20 + \frac{20 \times (-20)}{100} = -4\%\).

Plain: area factor = 1.2 × 0.8 = 0.96, so the area falls by 4%. Equal % up and down always gives a net decrease.

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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