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