The graphs show the total number of leaflets machines D and E printed from the start. Both machines started printing at the same time.
- How many more leaflets did E print than D in 10 minutes?
- Both machines did not change their rates of printing throughout. When D had printed 200 leaflets, how many leaflets had E printed?
(a)
Machine D:
15 min → 120
Machine E:
15 min → 150
Machine E more than Machine D:
15 min → 150 - 120 = 30
1 min → 30 ÷ 15 = 2
10 min → 10 x 2 = 20
Number of leaflets that machine E printed more than Machine D in 10 min = 20
(b)
Machine D:
200 leaflets → 25 min
Machine E:
15 min → 150
1 min → 150 ÷ 15 = 10
25 min → 25 x 10 = 250
Number of leaflets that E had printed when D had printed 200 leaflets = 250
Answer(s): (a) 20; (b) 250