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 more leaflets did T print than S in 4 minutes?
- Both machines did not change their rates of printing throughout. When S had printed 250 leaflets, how many leaflets had T printed?
(a)
Machine S:
10 min → 100
Machine T:
10 min → 150
Machine T more than Machine S:
10 min → 150 - 100 = 50
1 min → 50 ÷ 10 = 5
4 min → 4 x 5 = 20
Number of leaflets that Machine T printed more than Machine S in 4 min = 20
(b)
Machine S:
250 leaflets → 25 min
Machine T:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that Machine T had printed when Machine S had printed 250 leaflets = 375
Answer(s): (a) 20; (b) 375