Question

a wire in the form of a rectangle 11m long and 8m wide is re-bent in form of circle find area of cirlcle

Answer 1

hiii!!!

here's ur answer...

perimeter of rectangle=circumference of circle

given:-

length=11m

breadth=8m

perimeter of rectangle=2(l+b)

=2(11+8)

=2×19

=38m

therefore circumference of circle=38m

2πr=38m

2×22/7×r=38m

44/7×r=38m

r=38/1×7/44

r=19/1×7/22

r=133/22m

area of the circle=πr²

=22/7×133/22×133/22

=22/7×17689/484

=389158/3388

=114.86m²

hope this helps...

Answer 2

according to the question,
circumference of the circle=perimeter of the rectangle
2πr=2(l+b)
2πr=2(11+8)
22/7×r=19
r=19×7/22
r=6.04
then the area of the circle=πr²
=22/7×(6.04)²
=114.6m²