Q The sides of a rectangle are in the ratio 4 : 5 If the perimeter of the - Maths - Area and Perimeter of Plane Figure

Question

Q The sides of a rectangle are in the ratio 4 : 5 If the perimeter
of the rectangle is 90 cm, then its sides are
(A) 28, 35
(B) 20, 24
(C) 20, 25
(D) None of these

Smarty Sam · Answer

Let the sides be 4x and 5x
Perimeter=2(l+b)=90

2(4x+5x)=90
2(9x)=90
18x=90
x=90?18
Therefore,x=5

4x=4?5=20 cm
5x=5?5=25 cm

Q. The sides of a rectangle are in the ratio 4 : 5. If the perimeter of the rectangle is 90 cm, then its sides are (A) 28, 35 (B) 20, 24 (C) 20, 25 (D) None of these

Q. The sides of a rectangle are in the ratio 4 : 5. If the perimeter of the rectangle is 90 cm, then its sides are
(A) 28, 35
(B) 20, 24
(C) 20, 25
(D) None of these