PSLEThe graphs show the total number of leaflets machines E and F printed from the start. Both machines started printing at the same time.
- How many less leaflets did E print than F in 7 minutes?
- Both machines did not change their rates of printing throughout. When E had printed 300 leaflets, how many leaflets had F printed?
(a)
Machine E:
6 min → 60
Machine F:
6 min → 90
Machine E less than Machine F:
6 min → 90 - 60 = 30
1 min → 30 ÷ 6 = 5
7 min → 7 x 5 = 35
Number of leaflets that Machine E printed less than Machine F in 7 min = 35
(b)
Machine E:
300 leaflets → 30 min
Machine F:
6 min → 90
1 min → 90 ÷ 6 = 15
30 min → 30 x 15 = 450
Number of leaflets that Machine F had printed when Machine E had printed 300 leaflets = 450
Answer(s): (a) 35; (b) 450