Where are they mistakes?
public text v1 · immutableI don't know which are mistakes, you can help me to fix them
"Jacira is able to typewrite 20 pages of the manuscript in 4 hours and Joana also do it in 5 hours. There are still 900 pages of the manuscript to typewrite. If they start to typewrite at the same time, how many pages should the slower person take so that both finish together?"