Question

A circle of circumference 11cm is cut out of a square sheet of side

30cm. What is the area of paper left​

Answer 1

Step-by-step explanation:

area of square - area of circle

30×30 - 22\7 × 11×11

900- 380.28

519.72

Answer 2

Given: Circumference of circle(2πr)=11cm

Cut out of square sheet(side)=30cm

Solution: Circumference of circle=11cm

2πr=11cm

2×22/7×r=11cm

:. r=radius=11×7/22×2

:. r=7/4cm

Now,Area of circular sheet=πr2=22/7×(7/4)2

=22/7×49/16

=352×343/112

=120736/112

Area of sheet=1078sq.cm

Now,Area of square cut from circular sheet=(side)2=(30)2=900sq.cm

Area of paper left= Area of circular sheet-Area of square sheet cut from. it

Area of paper left=(1078-900)sq.cm

=178sq.cm

The area of paper left is 178sq.cm

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