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 9 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 → 150
Machine K more than Machine J:
10 min → 150 - 80 = 70
1 min → 70 ÷ 10 = 7
9 min → 9 x 7 = 63
Number of leaflets that machine K printed more than Machine J in 9 min = 63
(b)
Machine J:
200 leaflets → 25 min
Machine K:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that K had printed when J had printed 200 leaflets = 375
Answer(s): (a) 63; (b) 375