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 6 minutes?
- Both machines did not change their rates of printing throughout. When Q had printed 250 leaflets, how many leaflets had R printed?
(a)
Machine Q:
10 min → 50
Machine R:
10 min → 80
Machine Q less than Machine R:
10 min → 80 - 50 = 30
1 min → 30 ÷ 10 = 3
6 min → 6 x 3 = 18
Number of leaflets that machine Q printed less than Machine R in 6 min = 18
(b)
Machine Q:
250 leaflets → 50 min
Machine R:
10 min → 80
1 min → 80 ÷ 10 = 8
50 min → 50 x 8 = 400
Number of leaflets that R had printed when Q had printed 250 leaflets = 400
Answer(s): (a) 18; (b) 400