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 9 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 → 150
Machine A less than Machine B:
10 min → 150 - 50 = 100
1 min → 100 ÷ 10 = 10
9 min → 9 x 10 = 90
Number of leaflets that machine A printed less than Machine B in 9 min = 90
(b)
Machine A:
250 leaflets → 50 min
Machine B:
10 min → 150
1 min → 150 ÷ 10 = 15
50 min → 50 x 15 = 750
Number of leaflets that B had printed when A had printed 250 leaflets = 750
Answer(s): (a) 90; (b) 750