the length of the rectangular hall is 4 meter less than 3 times than the breadth of the hall. what is the length , if the the breadth is b meters?

 HERE IS THE ANSWER

IF BREADTH=b meters

THEN LENGTH=4 meter less than 3 times than the breadth of the hall.

LENGTH=3b-4 meters

the length of the rectangular hall is=3b-4 meters