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Questions  

The radius of a sphere is measured to be (1.2±0.2)cm. Calculate its volume with error limits.

a
(7.2±3.6)cm3
b
(2.7±3.6)cm3
c
(7.2±6.3)cm3
d
(2.7±6.3)cm3

detailed solution

Correct option is A

Volume, V=43πr3=43227(1.2)3=7.24 cm3=7.2 cm3Further, ΔVV=3ΔrrΔV=3ΔrrV=3×0.2×7.21.2=3.6 cm3V=(7.2±3.6)cm3

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