Question

a metal wire is bent in the shape of a square of area 49cm sq.it is then rebent to make a circle.find area and circumference of circle?

Answer 1

area of square = 49cm
side = 7cm
area of circle=22÷7×7×7=154
circumference = 2×22÷7×7=44

Answer 2

When wire is bent in the shape of square
Then area is 49cm sq.
S*S=49
S sq. =49
S=root of49
S=7
Perimeter =4*s
4*7=28
Thus length of the wire is equal to the circumfrance of the circle
28=2pie*r
28=2*22/7*r
R=28*7/2*22
R=14*7/22
R=98/22
R=4
Circumference of circle is 49
Area of circle=pie *r sq.
22/7*4*4
22/7*16
22*2.28
50.16