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 250 leaflets, how many leaflets had F printed?
(a)
Machine E:
30 min → 150
Machine F:
30 min → 300
Machine E less than Machine F:
30 min → 300 - 150 = 150
1 min → 150 ÷ 30 = 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:
250 leaflets → 50 min
Machine F:
30 min → 300
1 min → 300 ÷ 30 = 10
50 min → 50 x 10 = 500
Number of leaflets that F had printed when E had printed 250 leaflets = 500
Answer(s): (a) 35; (b) 500