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Q.

A thin wire has a length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures.

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a

0.14 cm3

b

0.144 cm3

c

0.28 cm3

d

0.1443 cm3

answer is D.

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Detailed Solution

Given, l=21.7 cm, r=0.46 mm=0.046 cm

Volume of wire V=πr2l

=227(0.046)2(21.7) =0.1443 cm3 =0.14 cm3

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