Mr Zhang used two printers with different printing rates for a printing job. He started Printer C at 18 10 and started Printer D two minutes later. He stopped both copiers at 18 15. 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 C at the time Mr Zhang started Printer D?
- What was the difference in the number of pages printed by the two copiers from 18 10 to 18 15?
- Which printer, C or D, has a slower printing rate? What is the difference in the number of pages printed by the copiers in one minute? Give your answer in this format. (Eg A, 1)