PSLEThe graphs show the total number of leaflets machines K and L printed from the start. Both machines started printing at the same time.
- How many more leaflets did L print than K in 9 minutes?
- Both machines did not change their rates of printing throughout. When K had printed 150 leaflets, how many leaflets had L printed?
(a)
Machine K:
6 min → 30
Machine L:
6 min → 60
Machine L more than Machine K:
6 min → 60 - 30 = 30
1 min → 30 ÷ 6 = 5
9 min → 9 x 5 = 45
Number of leaflets that Machine L printed more than Machine K in 9 min = 45
(b)
Machine K:
150 leaflets → 30 min
Machine L:
6 min → 60
1 min → 60 ÷ 6 = 10
30 min → 30 x 10 = 300
Number of leaflets that Machine L had printed when Machine K had printed 150 leaflets = 300
Answer(s): (a) 45; (b) 300