The graphs show the total number of leaflets machines C and D printed from the start. Both machines started printing at the same time.
- How many more leaflets did D print than C in 2 minutes?
- Both machines did not change their rates of printing throughout. When C had printed 200 leaflets, how many leaflets had D printed?
(a)
Machine C:
10 min → 80
Machine D:
10 min → 150
Machine D more than Machine C:
10 min → 150 - 80 = 70
1 min → 70 ÷ 10 = 7
2 min → 2 x 7 = 14
Number of leaflets that machine D printed more than Machine C in 2 min = 14
(b)
Machine C:
200 leaflets → 25 min
Machine D:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that D had printed when C had printed 200 leaflets = 375
Answer(s): (a) 14; (b) 375