Question

The length of rectangle is twice its breath if perimeter is 30 cm find the area of r
ectangle

Answer 1

Answer:

let b= x

l= 2x

x+2x= 30

3x=30

x=10 cm

hence, l= 20m

b= 10cm

area=lb

= 20*10

=200cm^2

Answer 2

let breadth of rectangle be " x "

:. length = 2x

perimeter of rectangle = 2 ( l + b )

:. 30 = 2 ( 2x + X )

:. 15 = 3x

:. X = 15 / 3

:. X = 5

now,

breadth = X = 5 cm

length = 2x = 2 * 5 cm

= 10 cm

SO.,.

AREA OF RECTANGLE = l * b

= 10 * 5

= 15 cm sq.