A rectangle has 15 cm as its length and 150 cm 2 as its area .Its area is increased to 1 1 / 3 times the original area by increasing only its length . Its new perimeter is?
Correct Answer: 60 cm
Explanation:
Breadth of the rectangle = (150/15) cm
= 10 cm New area = (4/3 x 150) cm2
= 200 cm2 New length = 200/10 cm
=20 cm New perimeters = 2(20 + 10) cm
= 60 cm
