Answer the following:

The length of a rectangular hall is 4 metres less than 3 times the breadth of the hall. What is the length, if the breadth is b metres?

According to the question,

We know that,

The breadth of the rectangular hall is b metres

Therefore,

Length of the rectangular hall = 3 × breadth – 4

l = (3 × b) – 4

l = 3b – 4

Hence,

The length will be 3b – 4