Question

the length of a rectangle is two times it's width. the perimeter of the rectangle is 180 cm.find the dimensions of the rectangle and also find it's area

Answer 1

Let the width of the rectangle be 'x' cm
Length=2x cm
By Qn,

2(2x+x)=180
ie
3x=90
x=30

hence,length =2x=2(30)=60cm

Area = lb=(60)(30)=1800cm^2

Answer 2

Let breadth be x
therefore, length=2x
p=2(l+b
180=2(x+2x)
180=2(3x)
6x=180
x=30
breadth=30cm
length=2×30=60cm
Area=l×b
=30×60
=1800cm^2