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 9 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 → 100
Machine R:
10 min → 150
Machine Q less than Machine R:
10 min → 150 - 100 = 50
1 min → 50 ÷ 10 = 5
9 min → 9 x 5 = 45
Number of leaflets that machine Q printed less than Machine R in 9 min = 45
(b)
Machine Q:
250 leaflets → 25 min
Machine R:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that R had printed when Q had printed 250 leaflets = 375
Answer(s): (a) 45; (b) 375