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.?
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.