Mr Ng used two printers with different printing rates for a printing job. He started Printer Y at 17 39 and started Printer Z two minutes later. He stopped both printers at 17 44. 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 Y at the time Mr Ng started Printer Z?
- What was the difference in the number of pages printed by the two printers from 17 39 to 17 44?
- Which printer, Y or Z, has a slower printing rate? What is the difference in the number of pages printed by the printers in one minute? Give your answer in this format. (Eg A, 1)