Question

perimeter of a rectangle is 20 m if its length is 8 metre find its area

Answer 1

Perimeter=20 m, l=8m
p=2*(l+b)
20 = 2(8+b)
10= 8+b
b=2m
Area = l* b= 8*2 = 16 m^2

Answer 2

perimeter = 2( l+b)
20m = 2 ( 8 + b )
after solving it u will b
b = 2m
area is l*b
16 m square