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Q.

Perform the following calculations and express the result to proper number of significant figures.

144.3 m2 + (2.54 m × 8.4 m)

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a

161

b

165

c

169

d

157

answer is A.

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Detailed Solution

144.3m2+(2.54m×8.4m)

2.54m×8.4m=21.336m2 or 21m2 (up to 2 significant figures) 

144.3m221.0m2

------------

165.3m2 or 165m2

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