PSLEThe graphs show the total number of leaflets machines M and N printed from the start. Both machines started printing at the same time.
- How many less leaflets did M print than N in 2 minutes?
- Both machines did not change their rates of printing throughout. When M had printed 250 leaflets, how many leaflets had N printed?
(a)
Machine M:
10 min → 100
Machine N:
10 min → 200
Machine M less than Machine N:
10 min → 200 - 100 = 100
1 min → 100 ÷ 10 = 10
2 min → 2 x 10 = 20
Number of leaflets that machine M printed less than Machine N in 2 min = 20
(b)
Machine M:
250 leaflets → 25 min
Machine N:
10 min → 200
1 min → 200 ÷ 10 = 20
25 min → 25 x 20 = 500
Number of leaflets that N had printed when M had printed 250 leaflets = 500
Answer(s): (a) 20; (b) 500