PSLEThe graphs show the total number of leaflets machines P and Q printed from the start. Both machines started printing at the same time.
- How many less leaflets did P print than Q in 9 minutes?
- Both machines did not change their rates of printing throughout. When P had printed 250 leaflets, how many leaflets had Q printed?
(a)
Machine P:
10 min → 50
Machine Q:
10 min → 150
Machine P less than Machine Q:
10 min → 150 - 50 = 100
1 min → 100 ÷ 10 = 10
9 min → 9 x 10 = 90
Number of leaflets that machine P printed less than Machine Q in 9 min = 90
(b)
Machine P:
250 leaflets → 50 min
Machine Q:
10 min → 150
1 min → 150 ÷ 10 = 15
50 min → 50 x 15 = 750
Number of leaflets that Q had printed when P had printed 250 leaflets = 750
Answer(s): (a) 90; (b) 750