The length and breadth of a rectangular sheet are and respectively. The area of the sheet in appropriate significant figures and error is:
Model Answer & Options
Source: Extra Practice163.62 ± 2.6 cm²
163.6 ± 2.6 cm²
164 ± 3 cm²
163.6 ± 3 cm²
Explanation
Area . Relative error . Absolute error . Since the least significant figure in the measurements is at the tenths place and the product must follow the least significant figures of the factors (3 sig figs here), we round 163.62 to 164. The error is rounded to 3 to match the precision. Thus, is the most appropriate representation according to NCERT guidelines for propagation and rounding.
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Test your skills on a similar concept: Units and Measurement - NCERT Class 11 Practice Set 1.
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