PSLEThe graphs show the total number of leaflets machines Q and R printed from the start. Both machines started printing at the same time.
- How many less leaflets did Q print than R in 7 minutes?
- Both machines did not change their rates of printing throughout. When Q had printed 300 leaflets, how many leaflets had R printed?
(a)
Machine Q:
6 min → 60
Machine R:
6 min → 90
Machine Q less than Machine R:
6 min → 90 - 60 = 30
1 min → 30 ÷ 6 = 5
7 min → 7 x 5 = 35
Number of leaflets that Machine Q printed less than Machine R in 7 min = 35
(b)
Machine Q:
300 leaflets → 30 min
Machine R:
6 min → 90
1 min → 90 ÷ 6 = 15
30 min → 30 x 15 = 450
Number of leaflets that Machine R had printed when Machine Q had printed 300 leaflets = 450
Answer(s): (a) 35; (b) 450