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Question

The length, breadth and thickness of a block are given by l = 12 cm, b = 6 cm, and t = 2.45 cm. The volume of the block according to the idea of significant figure should be


A
1×102cm3
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B
2×102cm3
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C
1.763×102cm3
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D
None of these
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Solution

The correct option is B $$2 \times 10^2 cm^3$$
Volume, $$V = l \times b \times t = 12 \times 6 \times 2.45$$
$$= 176.4 cm^3$$
Or $$V = 1.764 \times 10^2 cm^3$$
Since, the minimum number of significant figure is one in breadth, hence volume will also contain only one significant figure. Hence, $$V=2\times 10^2cm^3$$

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