Question

If the error in measuring diameter of a circle is 4%, the error in the circumference of the circle will be

Answer 1

Given:  

∆d/d

4/100=0.04

And you have to apply formula of ∆r/r

Percantage error in the part of radius = 0.04x100

= 4%

Therefore the candidate can collect the result of applying the given formula in the fine manner on the other hand the value are o found in the given question so that make sure and enter to calculate the exact answer for the question

Answer 2

d=2r

∆d/d×100=∆r/r×100

therefore

4%=∆r/r×100