Answers

2015-02-06T22:27:58+05:30
Ar.of sq.-ar. of cicle=ar. of remaining part
100-2x22(9+16)/7
100-78.6
21.4

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2015-02-07T08:58:51+05:30
Area of remaining sheet=Area of polywood sheet-Area of circle of 3dm-Area of circle of 4dm
area of Polywood sheet =side²=10×10=100dm²
area of circle of 3dm=πr²=π9dm²
are of circle of radius 4dm²
ATQ
100-π(9+16)=100-25×22/7=100-78.5=21.5dm²
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