Notice that AB is actually the radius of both semicircles.


So the length of the rectangle is the same as 3 radii of the semicircles

Notice that the breadth of the rectangle is the same as the radius of the semicircles.

Perimeter = 2 length + 2 breadth

= 2 x 3 radii + 2 x radius
= 6 radii + 2 radii
= 8 radii

This equals 56cm.


So 1 radius = 56cm ÷ 8 = 7cm



The figure has the curved length of two identical semicircles. Combine them together and you get the circumference of 1 circle.

Since we already know the rectangle's perimeter, we just need to find the circumference and add it to the perimeter to find the wire length.

Circumference = 2πr
= 2 x 22/7 x 7cm
= 44cm

Total wire length
= 44cm + 56cm
= 100cm