A truck contains many cartons. Paul removes 30 cartons in 4 minutes. If John removes cartons at the same rate, how long would it take him to remove 18 cartons (in minutes and seconds)?
Answer:
Let t be the time taken by John to remove 18 cartons.
Then, 30/4=18/t; 72/30=2.4minutes or 2 minutes 24 seconds.
