Q.

If the radius of a sphere is measured as 10cm with an error of 0.01 cm, then find the approximate error in calculating its volume.

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a

0.4π  cm3

b

0.41π  cm3

c

0.42π  cm3

d

4π  cm3

answer is D.

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Detailed Solution

measuring the radius, then r=10cm and Δr=0.01cm.     Now the volume V of the sphere is given byV=43πr3dVdr=4πr2dV=dVdrΔr=4πr2Δr=4π(10)2(0.01)cm3=4πcm3Thus, the approximate error in calculating the volume is 4π  cm3
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If the radius of a sphere is measured as 10cm with an error of 0.01 cm, then find the approximate error in calculating its volume.