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You load boxes onto an empty truck at a constant rate. After 3 hours, there are 100 boxes on the truck. How much longer do you work if you load a total of 120 boxes?

 Jan 31, 2021
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you need 20% more boxes

20% x 3 hrs =  .2  * 3 = .6 hour       36 minutes more

 Jan 31, 2021

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