The radius of a sphere is measured as 5 ...

The radius of a sphere is measured as 5 cm with an error possibly as large as 0.02 cm. The error and percentage error in computing the surface area of the sphere are :a)`0.8 pi and 0.2%` b)`0.8pi and 0.8%` c)`0.4pi and 0.4%` d)`pi and 1%`

A

`0.8 pi and 0.2%`

B

`0.8pi and 0.8%`

C

`0.4pi and 0.4%`

D

`pi and 1%`

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The correct Answer is:

B

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