At the office building, Storey C and Storey D had an equal number of chairs at first. If 8 chairs were removed from Storey D and 5 times as many chairs were removed from Storey C as Storey D, the number of chairs in Storey D would be 5 times as many as in Storey C. Find the number of chairs on each storey.

	Storey C	Storey D
Before	1 u	1 u
Change	- 40	- 8
After	1 u - 40	1 u - 8

Number of chairs removed from Storey C
= 5 x 8
= 40

Number of chairs on Storey C and Storey D at first is the same.

Number of chairs on Storey D is 5 times as many as Storey C in the end. If the number of chairs on Storey C increases by 5 times, the number of chairs on Storey C and Storey D will be the same.

5(1 u - 40) = 1 u - 8
5 u - 200 = 1 u - 8 
5 u - 1 u = 200 - 8
4 u = 192

1 u = 192 ÷ 4 = 48

Number of chairs in each floor
= 1 u
= 48

Answer(s): 48