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Every day Ike leaves his farm at 11:30 a.m. to take a load of potatoes to the chip producers. If he averages 50 km/h he arrives at 1:54 p.m., but if he averages 80 km/h he arrives at 1 p.m. At what speed must he travel to arrive at 12:45 p.m.?

 Sep 30, 2020
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1:54 pm - 11:30 am =2.4 hours it takes him to drive from his farm to Chip Producing Factory.

 

2.4 x 50 km/h = 120 km - the distance between his farm and the Chip Factory

 

12:45 pm - 11:30 am = 1.25 hours - time he wants to spend driving to Chip Factory

 

In order to arrive at 12:45 pm, he must average a speed of:

 

120 km / 1.25 hours = 96 km/h - he must average between his farm and the Chip Factory.

 Sep 30, 2020

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