Question

the sides of a rectangle are in the 5:4 and its perimeter is 90 cm . Find its leght and breadth​

Answer 1

Answer:

Answer:

Its length and breadth are 25 cm and 20 cm respectively.

Step-by-step explanation:

The sides of a rectangle are in the ratio 5:4

Let the ratio be x

so, Length = 5x

Breadth = 4x

Perimeter of rectangle = 2(l+b)2(l+b)

                                      = 2(5x+4x)2(5x+4x)

                                      = 2(9x)2(9x)

Now we are given that its perimeter is 90 cm

So, 2(9x)=902(9x)=90

18x=9018x=90

x=\frac{90}{18}x=1890

x=5x=5

So, Length = 5x = 5 \times 5 = 25cm5x=5×5=25cm

Breadth = 4x= 4\times 5 =20cm4x=4×5=20cm

Hence its length and breadth are 25 cm and 20 cm respectively.

Answer 2

Answer:

length - 50

breadth - 40

Step-by-step explanation:

5:4

5+4 =9

90/9=10

10*5=50

10*4=40

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