The length of a rectangle is 4 times of its breadth. If the area of the rectangle is 576 cm2, then what is the perimeter of this rectangle ?

112 cm 60 cm 56 cm 120 cm

120 cm

Here, Length = 4 x Breadth ⇒ Area of Rectangle = L x B = 576 cm2 ⇒ 4B x B = 576 cm2 ⇒ 4\( { B}^{ 2} \) = 576 ⇒ \( { B}^{ 2} \) = 144 ⇒ B = 12 cm Perimeter of Rectangle = 2(L + B) = 2 (48 + 12) = 2 x 60 = 120cm