PSLE
Mr Ee used two printers with different printing rates for a printing job. He started Printer W at 22 00 and started Printer X three minutes later. He stopped both machines at 22 05. The graphs show the total number of pages printed by each printer from the start of printing.

1. How many pages had been printed by Printer W at the time Mr Ee started Printer X?
2. What was the difference in the number of pages printed by the two machines from 22 00 to 22 05?
3. Which printer, W or X, has a faster printing rate? What is the difference in the number of pages printed by the machines in one minute? Give your answer in this format. (Eg A, 1)

(a)
At 22 03, number of pages that Printer W printed = 132

(b)
Number of pages printed by Printer W from 22 00 to 22 05
= 220

Number of pages printed by Printer X from 22 00 to 22 05
= 140

Difference in the number of pages printed by the two machines from 22 00 to 22 05
= 220 - 140
= 80

(c)
Printing rate of Printer W
= 220 ÷ 5
= 44

Printing rate of Printer X
= 140 ÷ 2
= 70 (Faster)

Difference in the number of pages printed by the machines in one minute
= 70 - 44
= 26

Answer(s): (a) 132; (b) 80; (c) X, 26