Q.

The length of a wire is 2.17 cm and radius is 0.46 cm. The number of significant digits in the value of volume of wire is ________________

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answer is 2.

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Detailed Solution

The volume of wire=πr2l=3.14×(0.46)2×2.17cm3=1.4418cm3=1.4cm3(The number of significant figures in multiplication or division should equal to minimum number of decimal points of a quantity involved in the operation.)Thus, number of significant digits in 1.4 cm3 is 2
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The length of a wire is 2.17 cm and radius is 0.46 cm. The number of significant digits in the value of volume of wire is ________________