Q.

Find, volume of a cube of side a=1.4×10-2 m.

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a

2.7×10-6 m3

b

2.7×10-3 m3

c

7.2×10-6 m3

d

None of these

answer is A.

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Detailed Solution

Volume V=a3=1.4×10-2×1.4×10-2×1.4×10-2=2.744×10-6 m3Since, each value of a has two significant figures. Hence, we will round off the result to two significant figures,V=2.7×10-6 m3
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