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A messenger is required to deliver 10 packages per day. Each day, the messenger works only for as long as it takes to deliver the daily quota of 10 packages. On average, the messenger is able to deliver 2 packages per hour on Saturday and 4 packages per hour on Sunday. What is the messenger’s average delivery rate on the weekend?

 Apr 8, 2019
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Saturday    2 p/hr   requires  5 hrs   for 10 pcgs

Sunday      4 p/hre  requires 2 1/2 hrs for 10 pcgs

 

20 pcgs/7.5 hr  = 20 /7.5 = 2.6666666666666667  pcgs/hr    (2  2/3 packages/hr)

 Apr 8, 2019

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