Question

20. The error in the measurement of the radius of a sphere is 2%. What will be the errore
calculation of its surface area?
ΔΑ
2Ar
[Hint : Surface area A = 4r, ..
l
A
r​

Answer 1

∆A/A=4%

Explanation:

∆r/r%=2%

surface area A=4/3πr^2

∆A/A%= (2∆r/r)

=2*2%

=4%