Answer:
60 minutes
Explanation:
Here is the complete question
Caylan is making baked goods for a charity bake sale. He places a tray of scones, a tray of muffins, and a tray of cookies in the oven. The scones bake for 15 minutes, the muffins bake for 12 minutes, and the cookies bake for 10 minutes. When one tray is done, he removes it and replaces it with another tray of the same item. How many minutes after Caylan puts the trays in the oven will he first remove the scones, muffins, and cookies at the same time? ? minutes
The multiples for scones = 15 = 3,5
The multiples for muffins = 12 =2, 2,2,3
The multiples for cookies = 2, 5
Lowest common multiple = 2 x 2 x 3 x 5 = 60 minutes
to determine the time , calculate the lowest common multiple of 12, 15 and 10