The side of a square is increased from 20cm to 21cm. Calculate the percentage increase in its area
a
2.5%
b
9.3%
c
10.0%
d
10.25%
Explanation
Correct Option
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Tayemise65
11 years ago
Old area=20^2=400
New area=21^2=441
Subtract the old area from the new area, 441-440=41
% Increase
= 41/400*100
=10.25%
