PSLEThe graphs show the total number of leaflets machines N and P printed from the start. Both machines started printing at the same time.
- How many less leaflets did N print than P in 7 minutes?
- Both machines did not change their rates of printing throughout. When N had printed 250 leaflets, how many leaflets had P printed?
(a)
Machine N:
20 min → 100
Machine P:
20 min → 200
Machine N less than Machine P:
20 min → 200 - 100 = 100
1 min → 100 ÷ 20 = 5
7 min → 7 x 5 = 35
Number of leaflets that machine N printed less than Machine P in 7 min = 35
(b)
Machine N:
250 leaflets → 50 min
Machine P:
20 min → 200
1 min → 200 ÷ 20 = 10
50 min → 50 x 10 = 500
Number of leaflets that P had printed when N had printed 250 leaflets = 500
Answer(s): (a) 35; (b) 500