PSLEThe graphs show the total number of leaflets machines J and K printed from the start. Both machines started printing at the same time.
- How many less leaflets did J print than K in 8 minutes?
- Both machines did not change their rates of printing throughout. When J had printed 250 leaflets, how many leaflets had K printed?
(a)
Machine J:
10 min → 100
Machine K:
10 min → 200
Machine J less than Machine K:
10 min → 200 - 100 = 100
1 min → 100 ÷ 10 = 10
8 min → 8 x 10 = 80
Number of leaflets that machine J printed less than Machine K in 8 min = 80
(b)
Machine J:
250 leaflets → 25 min
Machine K:
10 min → 200
1 min → 200 ÷ 10 = 20
25 min → 25 x 20 = 500
Number of leaflets that K had printed when J had printed 250 leaflets = 500
Answer(s): (a) 80; (b) 500