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 2 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 → 200
Machine Q less than Machine R:
10 min → 200 - 100 = 100
1 min → 100 ÷ 10 = 10
2 min → 2 x 10 = 20
Number of leaflets that machine Q printed less than Machine R in 2 min = 20
(b)
Machine Q:
250 leaflets → 25 min
Machine R:
10 min → 200
1 min → 200 ÷ 10 = 20
25 min → 25 x 20 = 500
Number of leaflets that R had printed when Q had printed 250 leaflets = 500
Answer(s): (a) 20; (b) 500