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 more leaflets did B print than A in 7 minutes?
- Both machines did not change their rates of printing throughout. When A had printed 200 leaflets, how many leaflets had B printed?
(a)
Machine A:
10 min → 80
Machine B:
10 min → 100
Machine B more than Machine A:
10 min → 100 - 80 = 20
1 min → 20 ÷ 10 = 2
7 min → 7 x 2 = 14
Number of leaflets that Machine B printed more than Machine A in 7 min = 14
(b)
Machine A:
200 leaflets → 25 min
Machine B:
10 min → 100
1 min → 100 ÷ 10 = 10
25 min → 25 x 10 = 250
Number of leaflets that Machine B had printed when Machine A had printed 200 leaflets = 250
Answer(s): (a) 14; (b) 250