Marc is decorating 60 cupcakes for a school fund-raiser. He starts working at 1:00 P. M. In the afternoon, first setting up his supplies and then starting to decorate. At 1:05 P. M. He has 5 cupcakes decorated. At 1:08 P. M. He has 10 cupcakes decorated. If he decorates cupcakes at a constant rate, at what time that afternoon will he finish decorating the 60 cupcakes?

Question

Taryn Lambert

Mathematics

14 November, 08:02

Marc is decorating 60 cupcakes for a school fund-raiser. He starts working at 1:00 P. M. In the afternoon, first setting up his supplies and then starting to decorate. At 1:05 P. M. He has 5 cupcakes decorated. At 1:08 P. M. He has 10 cupcakes decorated. If he decorates cupcakes at a constant rate, at what time that afternoon will he finish decorating the 60 cupcakes?

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Answers (2)

Know the Answer?

Hunter Olson · Answer 1

Hunter Olson 14 November, 08:18

0

I'm not sure but 1:48 P. M.

Isabell Johnston · Answer 2

1.38 pm.

Step-by-step explanation:

After 1.05 PM the rate at which he decorates the cakes is 10 - 5 = 5 cakes per 3 minutes = 5/3 cakes per minute. At 1.08 pm he has made 10 cupcakes.

At 1.08 he has to decorate another 50 cakes so the time he will take to do these is 50 / 5/3 = 50 * 3/5 = 30 minutes.

So the time when he finishes 60 cupcakes is 1.08 + 30

= 1.38 pm.