Question

the length of rectangle is twice its breadth . the perimeter of rectangle is 120 cm . find the length amd breadth . and also its area​

Answer 1

Answer:

let's assume breadth as x

so length = 2x

perimeter of a rectangle = 2(l+b) = 120

this implies 120 = 2 ( x+2x)

2 *3x = 120

3x = 120/2

3x = 60

x = 60/3

x = 20

so breadth = 20 cm

and length = 2x = 40cm

area of a rectangle = l*b

= 20*40

area = 800 cm square

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Answer 2

GIVEN,

l=2b

p=120cm

p=2(l+b)

p=2l+2b

p=2(2b)+2b

p=4b+2b

p=6b

120=6b

20cm=b

then,

l=40cm

Area=l*b

=40*20

=800

AREA OF THE RECTANGLE IS 800cm^2..

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