Mr Song used two printers with different printing rates for a printing job. He started Printer A at 19 04 and started Printer B three minutes later. He stopped both machines at 19 09. The graphs show the total number of pages printed by each printer from the start of printing.
- How many pages had been printed by Printer A at the time Mr Song started Printer B?
- What was the difference in the number of pages printed by the two machines from 19 04 to 19 09?
- Which printer, A or B, 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)