# A rectangle has 15 cm as its length and 150 cm² as its area :

A rectangle has 15 cm as its length and 150 cm² as its area. It’s area becomes to 4/3 times of the original area by increasing only its length. Its new perimeter is:

- 60 cm
- 70 cm
- 90 cm
- 80 cm

**Answer: (3) 90 cm **

**Solution:-**

The length of a rectangle = 15 cm

The are of the rectangle = 150 cm^2

Then, width of a rectangle = 150/15

= 10 cm

It area becomes to 4/3 times of the original area increasing by only length.

Then. the new area of the rectangle = 150 = 150 X 4/3

= 150 + 200

= 350 cm^2

Sp, length of the new rectangle = 350/10

= 35 cm

Then, the perimeter of new rectangle = 2 (35 + 10)

= 2 x 45

= 90 cm

Hence, the correct answer is option (3) 90 cm.