Question

the length of rectangular hall is 3 meters more than double of its breadth .If its perimeter is 66 meters ,what is it length

Answer 1

Length= 3+2b
Perimeter=66m
2(l+b)=66
2(3+2b+b)=66
2(3+3b)=66
6+6b=66
6b=60
b=10
length=3+2×10
=3+20
=23m

Answer 2

Answer:

13 m

Step-by-step explanation:

Define x:

Let the breadth be x

The length = x + 3

Solve x:

The perimeter is 66 m

2( Length + Breadth) = 66

2 (x + 3 + x ) = 66

2(3x + 3) = 66

3x + 3 = 33

3x = 30

x = 10

Find the length:

Length = x + 3 = 10 + 3 = 13 m

Answer: 13 m