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 more leaflets did Q print than P in 7 minutes?
- Both machines did not change their rates of printing throughout. When P had printed 200 leaflets, how many leaflets had Q printed?
(a)
Machine P:
15 min → 120
Machine Q:
15 min → 150
Machine Q more than Machine P:
15 min → 150 - 120 = 30
1 min → 30 ÷ 15 = 2
7 min → 7 x 2 = 14
Number of leaflets that Machine Q printed more than Machine P in 7 min = 14
(b)
Machine P:
200 leaflets → 25 min
Machine Q:
15 min → 150
1 min → 150 ÷ 15 = 10
25 min → 25 x 10 = 250
Number of leaflets that Machine Q had printed when Machine P had printed 200 leaflets = 250
Answer(s): (a) 14; (b) 250