Question

The area of a rectangle is 102 sqcm. If its length is 17 cm, what is its perimeter ?

Answer 1

Area of rectangle = 102 cm²
Length of the rectangle, l = 17 cm
∴ Breadth of the rectangle, b = $\frac{\mathrm{area}\mathrm{of}\mathrm{rectangle}}{\mathrm{length}\mathrm{of}\mathrm{rectangle}}$ (∵ area of rectangle = length × breadth)
⇒b = $\frac{102}{17}$ = 6 cm
Perimeter of rectangle = 2(length + breadth)
= 2(17 + 6)
= 2 × 23
= 46 cm