Question

The length of a rectangle hall is 3 metres more than double of its breadth. If its perimeter is 66 metres, what is the length?

Answer 1

let breadth of. rectangle be x
length =3+2x
perimeter=66
then 2(L+B)=66
2(3+2x+x)=66
2(3+3x)=66
6+6x=66
x=10.
then length equals to 3+20=23metre

Answer 2

Let the breadth be x. Then,
length = 2x+3
Perimeter of rectangle = 2( l+b)
66 = 2(2x+3 + x)
66 = 2(3x+3)
66 = 6x+6
66-6 = 6x
60 = 6x
x = 60/6
x = 10
Hence, breadth of rectangle = 10m
length = 2×10+3
= 20 + 3
= 23 m


Hope it helps you
Regards
Tanisha