Question

find the length of a rectangle whose perimeter is 90 cm and sides are in the ratio of 5:4.​

Answer 1

Answer: 25

Step-by-step explanation:

Let the two sides be 5x and 4x .

Perimeter of a rectangle = 2*(l + b) = 90cm

                                           = 2*( 5x + 4x ) = 90cm

                                           =  9x = 90/2 = 45

                                           = x = 45/9 = 5

The length of the rectangle = 5x = 5*5 = 25

Answer 2

Answer:

let

length be 5x cm

breath be 4x cm

perimeter= 2(l +b)

= 90 = 2(5x+4x)

90/2=9x

45=9x

= 45/9=x

=5=x

length=5x=5×5=25cm

breath=4x=4×5=20 cm

Step-by-step explanation:

I hope it help you