Question

perimeter of a rectangle is 320 CM if the ratio of the length is length of the side is 3:5 find the length and breadth of the rectangle

Answer 1

Hey Friend,

Let x be the common factor
Ratio=3x:5x

Perimeter= 2(l+b)
320= 2(3x+5x)
320/2= 8x
8x= 160
x= 20

Therefore,

Length=3x=3*20=60
Breadth=5x=5*20=100

Hope it helps.... :)

Answer 2

perimeter of the rectangle=320cm
the ratio of length to breadth=3:5
let the length of the rectangle be 3x cm and its breadth be 5x cm.
according to the given condition
perimeter=320
=>2(length+breadth)=320
=>2(3x + 5x)=320
=>16x=320
=>x=20

hence,the length of rectangle=3x=3x 3*20=60cm
and breadth of rectangle=5x=5*20=100cm

hope this help you!