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 8 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 → 100
Machine Q:
10 min → 150
Machine P less than Machine Q:
10 min → 150 - 100 = 50
1 min → 50 ÷ 10 = 5
8 min → 8 x 5 = 40
Number of leaflets that machine P printed less than Machine Q in 8 min = 40
(b)
Machine P:
250 leaflets → 25 min
Machine Q:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that Q had printed when P had printed 250 leaflets = 375
Answer(s): (a) 40; (b) 375