Question

The least possible perimeter of a rectangle of area 100 m² is ...

(a) 10 

(b) 20 

(c) 40 

(d) 60

Answer 1

(c) 40

Let the length of the rectangle = x m 

Let the length of the breadth = y m

Area of the rectangle A = 100 (given)

The least perimeter = 2(x + y) = 2(10 + 10) = 40 cm