Errors in measurementEasy
Question
If error in measuring diamete r of a circle is 4%, the error in the radius of the circle would be
Options
A.2 %
B.8 %
C.4 %
D.1 %
Solution
d = 2r
d + ᐃd = 2(r + ᐃr)
so error will also be 2 times
But percentage error : ᐃd × 100/d = 2ᐃr × 100 / 2r
⇒ 4 %
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