PSLEThe graphs show the total number of leaflets machines U and V printed from the start. Both machines started printing at the same time.
- How many less leaflets did U print than V in 7 minutes?
- Both machines did not change their rates of printing throughout. When U had printed 250 leaflets, how many leaflets had V printed?
(a)
Machine U:
10 min → 100
Machine V:
10 min → 200
Machine U less than Machine V:
10 min → 200 - 100 = 100
1 min → 100 ÷ 10 = 10
7 min → 7 x 10 = 70
Number of leaflets that machine U printed less than Machine V in 7 min = 70
(b)
Machine U:
250 leaflets → 25 min
Machine V:
10 min → 200
1 min → 200 ÷ 10 = 20
25 min → 25 x 20 = 500
Number of leaflets that V had printed when U had printed 250 leaflets = 500
Answer(s): (a) 70; (b) 500