Question

the perimeter of rectangle is 72 cm. the length is 3 times the width.find the area of rectangle?​

Answer 1

Answer:

243 cm^2

Step-by-step explanation:

Let the width= x cm

so, length= 3x cm__________(1)

Perimeter of a rectangle= 2*(length+width)

2*(3x+x)=72

2*(4x)=72

8x=72

x=72/8

x=9

so, width=9 cm

putting the value of x=9 in equation (1), we get

length=3*9

=27 cm

Area of a rectangle= length* width

=9*27

= 243 cm^2