1. 14 × 10² 2. 138 × 10¹ 3. 1382 4. 1382.5

Topic: Least count, significant figures and errors in measurement· Physics and Measurement

The area of a rectangular field (in m^2) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is :

1. \(14 \times 10^{2}\)

2. \(138 \times 10^{1}\)

3. 1382

4. 1382.5

Doubtly Asked 30 Oct 2026 NEET UG 2022 Practice test neet Save WhatsApp Report

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Answer: 1. \(14 \times 10^{2}\)

Area \(=55.3\times25=1382.5\ \text{m}^2\).

In multiplication the answer keeps as many significant figures as the least precise number. 25 has 2 significant figures, so round to 2 figures: \(1400=14\times10^{2}\ \text{m}^2\).

Option (1).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The area of a rectangular field (in m^2) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is :

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