PSLEThe graphs show the total number of leaflets machines Y and Z printed from the start. Both machines started printing at the same time.
- How many less leaflets did Y print than Z in 5 minutes?
- Both machines did not change their rates of printing throughout. When Y had printed 300 leaflets, how many leaflets had Z printed?
(a)
Machine Y:
6 min → 60
Machine Z:
6 min → 90
Machine Y less than Machine Z:
6 min → 90 - 60 = 30
1 min → 30 ÷ 6 = 5
5 min → 5 x 5 = 25
Number of leaflets that Machine Y printed less than Machine Z in 5 min = 25
(b)
Machine Y:
300 leaflets → 30 min
Machine Z:
6 min → 90
1 min → 90 ÷ 6 = 15
30 min → 30 x 15 = 450
Number of leaflets that Machine Z had printed when Machine Y had printed 300 leaflets = 450
Answer(s): (a) 25; (b) 450