Question

6.
The percentage error in measurement of radius of
sphere is 2.5%. Then the percentage error in the
surface area of sphere will be
(1) 5%
(2) 2.5%
(3) 1.25%
(4) 7.5%​

Answer 1

Answer:

5%

Explanation:

area of sphere = 4πr^2

% error in r = 2.5

% error in area of sphere = r × power

=2.5 × 2

= 5%

Answer 2

Answer:

5%

Explanation:

1. A=4πr2
2. ∆A/A ×100=2{∆r/r ×100}
3. =2×2.5
4. =5%