Q.

If y = 2.21 x 0.3, then the number of significant digits in the value of y is_________.

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answer is 1.

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Detailed Solution

∵y=2.21×0.3=0.663=0.7 (The number of significant figures in multiplication or division should equal to minimum number of decimal points of a quantity involved in the operation.)∴ The number of significant digit is 1.
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