PSLEThe graphs show the total number of leaflets machines S and T printed from the start. Both machines started printing at the same time.
- How many less leaflets did S print than T in 3 minutes?
- Both machines did not change their rates of printing throughout. When S had printed 300 leaflets, how many leaflets had T printed?
(a)
Machine S:
6 min → 60
Machine T:
6 min → 90
Machine S less than Machine T:
6 min → 90 - 60 = 30
1 min → 30 ÷ 6 = 5
3 min → 3 x 5 = 15
Number of leaflets that Machine S printed less than Machine T in 3 min = 15
(b)
Machine S:
300 leaflets → 30 min
Machine T:
6 min → 90
1 min → 90 ÷ 6 = 15
30 min → 30 x 15 = 450
Number of leaflets that Machine T had printed when Machine S had printed 300 leaflets = 450
Answer(s): (a) 15; (b) 450