PSLEThe graphs show the total number of leaflets machines L and M printed from the start. Both machines started printing at the same time.
- How many less leaflets did L print than M in 4 minutes?
- Both machines did not change their rates of printing throughout. When L had printed 250 leaflets, how many leaflets had M printed?
(a)
Machine L:
10 min → 100
Machine M:
10 min → 200
Machine L less than Machine M:
10 min → 200 - 100 = 100
1 min → 100 ÷ 10 = 10
4 min → 4 x 10 = 40
Number of leaflets that machine L printed less than Machine M in 4 min = 40
(b)
Machine L:
250 leaflets → 25 min
Machine M:
10 min → 200
1 min → 200 ÷ 10 = 20
25 min → 25 x 20 = 500
Number of leaflets that M had printed when L had printed 250 leaflets = 500
Answer(s): (a) 40; (b) 500