PSLEThe graphs show the total number of leaflets machines T and U printed from the start. Both machines started printing at the same time.
- How many less leaflets did T print than U in 9 minutes?
- Both machines did not change their rates of printing throughout. When T had printed 300 leaflets, how many leaflets had U printed?
(a)
Machine T:
6 min → 60
Machine U:
6 min → 90
Machine T less than Machine U:
6 min → 90 - 60 = 30
1 min → 30 ÷ 6 = 5
9 min → 9 x 5 = 45
Number of leaflets that Machine T printed less than Machine U in 9 min = 45
(b)
Machine T:
300 leaflets → 30 min
Machine U:
6 min → 90
1 min → 90 ÷ 6 = 15
30 min → 30 x 15 = 450
Number of leaflets that Machine U had printed when Machine T had printed 300 leaflets = 450
Answer(s): (a) 45; (b) 450