The graphs show the total number of leaflets machines X and Y printed from the start. Both machines started printing at the same time.
- How many more leaflets did Y print than X in 7 minutes?
- Both machines did not change their rates of printing throughout. When X had printed 250 leaflets, how many leaflets had Y printed?
(a)
Machine X:
10 min → 100
Machine Y:
10 min → 150
Machine Y more than Machine X:
10 min → 150 - 100 = 50
1 min → 50 ÷ 10 = 5
7 min → 7 x 5 = 35
Number of leaflets that machine Y printed more than Machine X in 7 min = 35
(b)
Machine X:
250 leaflets → 25 min
Machine Y:
10 min → 150
1 min → 150 ÷ 10 = 15
25 min → 25 x 15 = 375
Number of leaflets that Y had printed when X had printed 250 leaflets = 375
Answer(s): (a) 35; (b) 375