Question

the length of a rectangular hall is 3 meter
more than the one of its breadth if its perimeter is 66 M what is it length

Answer 1

let the breadth be x m
then length=x+3 m
perimeter = 2 (l+b)
66m= 2 (x+3+x)
66÷2=2x+3
33-3=2x
x=39÷2=15
length=3+15=18