Mr Ng used two printers with different printing rates for a printing job. He started Printer Q at 20 18 and started Printer R one minute later. He stopped both copiers at 20 23. 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 Q at the time Mr Ng started Printer R?
- What was the difference in the number of pages printed by the two copiers from 20 18 to 20 23?
- Which printer, Q or R, 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)