PSLEThe graphs show the total number of leaflets machines A and B printed from the start. Both machines started printing at the same time.
- How many less leaflets did A print than B in 7 minutes?
- Both machines did not change their rates of printing throughout. When A had printed 250 leaflets, how many leaflets had B printed?
(a)
Machine A:
10 min → 50
Machine B:
10 min → 60
Machine A less than Machine B:
10 min → 60 - 50 = 10
1 min → 10 ÷ 10 = 1
7 min → 7 x 1 = 7
Number of leaflets that machine A printed less than Machine B in 7 min = 7
(b)
Machine A:
250 leaflets → 50 min
Machine B:
10 min → 60
1 min → 60 ÷ 10 = 6
50 min → 50 x 6 = 300
Number of leaflets that B had printed when A had printed 250 leaflets = 300
Answer(s): (a) 7; (b) 300