Question

hola,

the sides of a rectangle are in the ratio 5:4and it's perimeter is 90cm.find it's length and breadth.

chapter: parallelogram
class: 8

have a great day

Answer 1

Side of rectangle -5:4
let length =5x
and breadth=4x

Perimeter of rectangle=2(l+b)
90=2(5x+4x)
90/2=9x
45=9x
x=45/9
x=5
length=5*5=25cm
breadth=4*5=20cm

thank u

Answer 2

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GIVEN ▶

✔ Sides of rectangle ▶5:4

Let length ▶5x ----1.
breadth ▶4x-----2.

Then ,

perimeter of rectangle ▶ 2(l+b)

perimeter ▶90(given)

So,

90=2(5x+4x)

90/2=9x

45=9x

x=5✔✔


Now , put the value of x in equation 1 and 2

so, length of rectangle ▶ 5x ▶5×5▶25

breadth of rectangle ▶ 4x ▶4×5 ▶20


THANKS ✌✌✌☺