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 more leaflets did Z print than Y in 7 minutes?
- Both machines did not change their rates of printing throughout. When Y had printed 150 leaflets, how many leaflets had Z printed?
(a)
Machine Y:
6 min → 30
Machine Z:
6 min → 60
Machine Z more than Machine Y:
6 min → 60 - 30 = 30
1 min → 30 ÷ 6 = 5
7 min → 7 x 5 = 35
Number of leaflets that Machine Z printed more than Machine Y in 7 min = 35
(b)
Machine Y:
150 leaflets → 30 min
Machine Z:
6 min → 60
1 min → 60 ÷ 6 = 10
30 min → 30 x 10 = 300
Number of leaflets that Machine Z had printed when Machine Y had printed 150 leaflets = 300
Answer(s): (a) 35; (b) 300