Question

14. The length of a rectangle is twice of its breadth. If its perimeter is 60 cm, find its length.​

Answer 1

Answer:

Step-by-step explanation:

let length be "2x"

breadth=x

60cm=2(2x+x)

30=3x

x=10cm

length=20cm

breadth=10cm

Answer 2

Answer:

20 cm

Step-by-step explanation:

let the breadth of the rectangle = x

so, the length of the rectangle = 2x

we know that, perimeter of a rectangle = 2(l + b)      

also given that perimeter = 60cm

ie, 2(l + b) = 60

ie, 2(x + 2x) = 60

ie, 2 × 3x = 60

ie, 6x = 60  and x = 60/6 = 10

so the length of the rectangle = 2x = 2×10 = 20cm