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 5 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:
10 min → 50
Machine S:
10 min → 200
Machine R less than Machine S:
10 min → 200 - 50 = 150
1 min → 150 ÷ 10 = 15
5 min → 5 x 15 = 75
Number of leaflets that machine R printed less than Machine S in 5 min = 75
(b)
Machine R:
250 leaflets → 50 min
Machine S:
10 min → 200
1 min → 200 ÷ 10 = 20
50 min → 50 x 20 = 1000
Number of leaflets that S had printed when R had printed 250 leaflets = 1000
Answer(s): (a) 75; (b) 1000