Question

draw a rectangle of one side 7 and area equal to the area of a square of side 5cm

Answer 1

Here since are of the rectangle = area of square
Let unknown side be b,

lxb = s^2
7 b = 5^2
7 b = 25
b = 25/7
b = 3.5 cm

The unknown side is 3.5 cm. Hope you can draw it now!