Question 7
Working alone, Ryan can dig a 5 m by 5 m by 5 m hole in six hours. Castel can dig a 10 m by 10 m by 5 m hole in twelve hours. How many hours would it take them to dig a 5 m by 5 m by 5 m hole if they worked together?
Assume each person digs at a constant rate and their rates add when working together.
Assume each person digs at a constant rate and their rates add when working together.