Question

the length of a rectangular plot of land is twice its breadth.if the perimeter of the plot be 300m, find its area.

Answer 1

length of land is twice it's breadth
L=2B
perimeter of rectangle is 2(L+B)=300
2(2B+B)=300
3B=300/2
3B=150
Breadth is 50 meter
length is 100 meter
Area is l×b=(100)×(50)
5000m^2 is the area.

Answer 2

we know that perimeter of a rectangle is 
PERIMETER=2(L+B)  
A/c your question L=2B 
p=2(l+2l)
300=2(3l)
150=3l
l=50 m
and the area of a rectangle is L×B
50×25=1250 M².
HOPE YOU UNDERSTADE IT.