PSLEThe graphs show the total number of leaflets machines W and X printed from the start. Both machines started printing at the same time.
- How many less leaflets did W print than X in 3 minutes?
- Both machines did not change their rates of printing throughout. When W had printed 250 leaflets, how many leaflets had X printed?
(a)
Machine W:
20 min → 100
Machine X:
20 min → 200
Machine W less than Machine X:
20 min → 200 - 100 = 100
1 min → 100 ÷ 20 = 5
3 min → 3 x 5 = 15
Number of leaflets that machine W printed less than Machine X in 3 min = 15
(b)
Machine W:
250 leaflets → 50 min
Machine X:
20 min → 200
1 min → 200 ÷ 20 = 10
50 min → 50 x 10 = 500
Number of leaflets that X had printed when W had printed 250 leaflets = 500
Answer(s): (a) 15; (b) 500