Question

The length of a rectangle is three times the breadth. If the minimum perimeter of the rectangle is 160 cm, then ______.

Options

• Breadth > 20 cm

• Length < 20 cm

• Breadth x ≥ 20 cm

• Length ≤ 20 cm

Answer 1

The length of a rectangle is three times the breadth. If the minimum perimeter of the rectangle is 160 cm, then breadth x ≥ 20 cm.

Explanation:

Breadth x ≥ 20 cm is the correct choice. If x cm is the breadth, then 2(3x + x) ≥ 160 ⇒ x ≥ 20.