Mr Song used two printers with different printing rates for a printing job. He started Printer U at 21 01 and started Printer V three minutes later. He stopped both machines at 21 06. 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 U at the time Mr Song started Printer V?
- What was the difference in the number of pages printed by the two machines from 21 01 to 21 06?
- Which printer, U or V, 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)