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The donut machine churns out 1 donut every 8 seconds. If there are 6 identical donut machines working at the same time, what is the speed of donut making in terms ofboxes per hour, where each box contains a dozen donuts?

 
 Jan 10, 2021
 #1
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1 d / 8 sec -m  * 6 m  * 3600 sec/hr   *  1 box/12 d = 225 box/hr

 
 Jan 11, 2021
 #2
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There are 60*60=3600 seconds in 1 hour. Every 8 seconds, 1 donut comes out. 3600/8 is 450. There are 6 machines working. 6*450 is 2700. One box is 12 donuts. 2700/12 is 225.

So the machines make enough donuts to fill 225 boxes per hour

 
 Jan 11, 2021

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