A wire is in the shape of a rectangle whose sides are in the ratio 7 : 4. It was initially in the shape of a circle of radius, very nearly equal to 31.5 cm. The length of smaller side of the rectangle is:(Take $$\pi = \frac{22}{7}$$)
Length of wire = circumference of the circle = $$2\pi\ r$$
$$2\times\ \frac{22}{7}\times\ 31.5=198$$
Let the length and breadth of the rectangle be 7x and 4x respectively
So, 2(7x+4x)=198
22x = 198
x=9
Breadth = 36 cm.
Create a FREE account and get: