Question 117

In measuring the side of a square, an error of 5% in excess is made.
The error % in the calculated area is:

Solution

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Let us assume the original side to be 10 units.
The length of side is mistakenly taken as 10*1.05 = 10.5 units.
The initial area was 10*10 = 100 sq units and the incorrect area is 10.5*10.5 = 110.25 units.
The change in area is 10.25%.

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