The 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 more leaflets did B print than A in 4 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 → 100
Machine B:
10 min → 150
Machine B more than Machine A:
10 min → 150 - 100 = 50
1 min → 50 ÷ 10 = 5
4 min → 4 x 5 = 20
Number of leaflets that machine B printed more than Machine A in 4 min = 20
(b)
Machine A:
250 leaflets → 25 min
Machine B:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that B had printed when A had printed 250 leaflets = 375
Answer(s): (a) 20; (b) 375