Question

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

• A. Breadth 20 cm
• B. Length 20 cm
• C. Breadth x 20 cm
• D. Length 20 cm

Answer 1

The correct option is C

Breadth x 20 cm

Let $x$ be the breadth of the rectangle , then length = 3$x$

Perimeter of the Rectangle = 2( Length + Breadth)

According to given Condition

2 (3$x$ + $x$ ) $\ge$ 160

$x$ $\ge$ 20