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Example 1 Least DistanceTime
A boat leaves a dock at noon and heads west at a speed of 25 km/hr. Another boat heads north at 20 km/hr and reaches the same dock at 1:00 pm. At what time are the boats closest to each other? (Ans= 12:23 pm)
More Optimizing Least Distance and or Time
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October 14, 2016Example 2 Least DistanceCost A cable television company is laying cable in an area with underground utilities. Two subdivsions are located on opposite sides of a 200 m wide river. The company has to connect points P and Q with cable, where P is on the south bank and Q is on the north bank 2000 m east of P. It costs $8 /m to lay cable underground and $10 /m to lay cable underwater. What is the least expensive way to lay the cable and what is the minimum cost?
P.146#12, 14, 15, 16
Worksheet#2, 3, 5
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October 14, 2016