Question

Evan is going to make a cake for his mother's birthday. It will take 26 minutes to make the cake batter, and the cake needs to bake in the oven for 1 hour and 13 minutes. If Evan wants the cake to be out of the oven by 12:39 P.M., what is the latest time he can start making the cake batter?

Answer 1

Explanation:

calculating backwards :

12:39 pm minus 1 hour 13 minutes = 11:26 am

the cake needs to get into the oven latest at that time.

caucuses further backwards :

11:26 am minus 26 minutes = 11:00 am

Evan has to start latest at 11:00 am to have the cake ready at 12:39 pm.