PSLEThe graphs show the total number of leaflets machines L and M printed from the start. Both machines started printing at the same time.
- How many more leaflets did M print than L in 7 minutes?
- Both machines did not change their rates of printing throughout. When L had printed 200 leaflets, how many leaflets had M printed?
(a)
Machine L:
4 min → 40
Machine M:
4 min → 60
Machine M more than Machine L:
4 min → 60 - 40 = 20
1 min → 20 ÷ 4 = 5
7 min → 7 x 5 = 35
Number of leaflets that Machine M printed more than Machine L in 7 min = 35
(b)
Machine L:
200 leaflets → 20 min
Machine M:
4 min → 60
1 min → 60 ÷ 4 = 15
20 min → 20 x 15 = 300
Number of leaflets that Machine M had printed when Machine L had printed 200 leaflets = 300
Answer(s): (a) 35; (b) 300