The graphs show the total number of leaflets machines H and J printed from the start. Both machines started printing at the same time.
- How many more leaflets did J print than H in 7 minutes?
- Both machines did not change their rates of printing throughout. When H had printed 200 leaflets, how many leaflets had J printed?
(a)
Machine H:
15 min → 120
Machine J:
15 min → 150
Machine J more than Machine H:
15 min → 150 - 120 = 30
1 min → 30 ÷ 15 = 2
7 min → 7 x 2 = 14
Number of leaflets that machine J printed more than Machine H in 7 min = 14
(b)
Machine H:
200 leaflets → 25 min
Machine J:
15 min → 150
1 min → 150 ÷ 15 = 10
25 min → 25 x 10 = 250
Number of leaflets that J had printed when H had printed 200 leaflets = 250
Answer(s): (a) 14; (b) 250