PSLEThe graphs show the total number of leaflets machines R and S printed from the start. Both machines started printing at the same time.
- How many less leaflets did R print than S in 10 minutes?
- Both machines did not change their rates of printing throughout. When R had printed 250 leaflets, how many leaflets had S printed?
(a)
Machine R:
30 min → 150
Machine S:
30 min → 300
Machine R less than Machine S:
30 min → 300 - 150 = 150
1 min → 150 ÷ 30 = 5
10 min → 10 x 5 = 50
Number of leaflets that machine R printed less than Machine S in 10 min = 50
(b)
Machine R:
250 leaflets → 50 min
Machine S:
30 min → 300
1 min → 300 ÷ 30 = 10
50 min → 50 x 10 = 500
Number of leaflets that S had printed when R had printed 250 leaflets = 500
Answer(s): (a) 50; (b) 500