The graphs show the total number of leaflets machines J and K printed from the start. Both machines started printing at the same time.
- How many more leaflets did K print than J in 8 minutes?
- Both machines did not change their rates of printing throughout. When J had printed 200 leaflets, how many leaflets had K printed?
(a)
Machine J:
10 min → 80
Machine K:
10 min → 100
Machine K more than Machine J:
10 min → 100 - 80 = 20
1 min → 20 ÷ 10 = 2
8 min → 8 x 2 = 16
Number of leaflets that machine K printed more than Machine J in 8 min = 16
(b)
Machine J:
200 leaflets → 25 min
Machine K:
10 min → 100
1 min → 100 ÷ 10 = 10
25 min → 25 x 10 = 250
Number of leaflets that K had printed when J had printed 200 leaflets = 250
Answer(s): (a) 16; (b) 250