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 7 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:
20 min → 100
Machine M:
20 min → 200
Machine L less than Machine M:
20 min → 200 - 100 = 100
1 min → 100 ÷ 20 = 5
7 min → 7 x 5 = 35
Number of leaflets that machine L printed less than Machine M in 7 min = 35
(b)
Machine L:
250 leaflets → 50 min
Machine M:
20 min → 200
1 min → 200 ÷ 20 = 10
50 min → 50 x 10 = 500
Number of leaflets that M had printed when L had printed 250 leaflets = 500
Answer(s): (a) 35; (b) 500