PSLEThe 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 less leaflets did C print than D in 8 minutes?
- Both machines did not change their rates of printing throughout. When C had printed 250 leaflets, how many leaflets had D printed?
(a)
Machine C:
10 min → 50
Machine D:
10 min → 60
Machine C less than Machine D:
10 min → 60 - 50 = 10
1 min → 10 ÷ 10 = 1
8 min → 8 x 1 = 8
Number of leaflets that machine C printed less than Machine D in 8 min = 8
(b)
Machine C:
250 leaflets → 50 min
Machine D:
10 min → 60
1 min → 60 ÷ 10 = 6
50 min → 50 x 6 = 300
Number of leaflets that D had printed when C had printed 250 leaflets = 300
Answer(s): (a) 8; (b) 300