Question

A wire is in the form of a square of side 27.5 cm. It is straightened and bent into
the shape of a circle. Find the area of the circle.
A wire is in the form of a rectangle 18.7 cm long and 14.3 cm wide. If this wire is​

Answer 1

=> Perimeter of 4 x 27.5 => 110 cm

Now, C = 2πr

=> 110 = 2πr

=> r = 110/2π = 55/π cm

Also as area = πr²

=> π(55/π)²

=>3025/π cm²

=> 962.9 cm²

Answer 2

Length of the wire = 4 × 27.5 cm = 110 cm

Now, the perimeter of the circle = 110 cm = 2 × 22/7 × r

So, the radius of the circle = 35/2 cm

Area of the circle = 22/7 × 35/2 × 35/2 sq. cm

=11×5×35/2 sq. cm = 962.5 sq. cm

Length of the second wire = Perimeter of the rectangle = 2(18.7 + 14.3) m = 66m