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Question

Find the area of the Figure in square cm,correct to one place of decimal. (Take π=227)


Solution

Length of square (a)=10 cm.

 Area=a2=(10)2=100 cm2

Base of the right triangle AED=8 cm and height =6 cm

 Area=12×8×6=24 cm2Radius of semicircle (r)=102=5 cm

 Area=12πr2=12×227×5×5 cm2=2757 cm2

 Area of the figure=100+275724=76+39.28=115.28=115.3 cm2


Mathematics
RD Sharma
Standard VIII

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