A team of bricklayers are helping to construct a new building. There are 7 bricklayers working in the team, and they will complete the outer wall of a new building in 63 days.
The number of days required to complete the job is inversely proportional to the number of bricklayers.
a) Create a formula for the time taken (in days), in terms of the number of bricklayers on the job.
b) If 2 additional bricklayers had been employed from the start of the job, how many fewer days would it take to complete the outer wall of the building?
This video was made when a school building was being constructed on site. KIER Construction kindly allowed a number of videos to be made so that students could grasp the use of Maths in the construction industry. Whilst this is a complex arithmetic problem, students who understand direct and inverse proportion normally solve this in around 7-8 minutes in class.