12. The perimeter of a square is 60m, find:-
(i) it's area
s new area obtained on increasing each of it's sides by 2cm.
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Answer:
perimeter of square 9 = 4 × length of side ....
so , 4 × 60 = 240
perimeter = 0 .
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perimeter of square=4×side
60=4×side
side=15.
area of square=15×15
=225
After increasing side by 2cm
side+2=15+2/100 m
=1500+2/100
=1502/100
=15.02 m
new area=15.02×15.02
=225.6m
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