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 10 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:
30 min → 150
Machine Q:
30 min → 300
Machine P less than Machine Q:
30 min → 300 - 150 = 150
1 min → 150 ÷ 30 = 5
10 min → 10 x 5 = 50
Number of leaflets that machine P printed less than Machine Q in 10 min = 50
(b)
Machine P:
250 leaflets → 50 min
Machine Q:
30 min → 300
1 min → 300 ÷ 30 = 10
50 min → 50 x 10 = 500
Number of leaflets that Q had printed when P had printed 250 leaflets = 500
Answer(s): (a) 50; (b) 500