12 The cost of running a car at an average speed of V km h is given by c = 100 + cents 75 per hour. Find the average speed (to the nearest km h) at which the cost of a 1000 km trip is a minimum.
12 The cost of running a car at an average speed of V km h is given by c = 100 + cents 75 per hour. Find the average speed (to the nearest km h) at which the cost of a 1000 km trip is a minimum.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Show working out. The answer is 87km/h
Transcribed Image Text:12 The cost of running a car at an average speed of V km h¯ is given by c = 100 + -
cents
75
per hour. Find the average speed (to the nearest km h¯') at which the cost of a 1000 km
trip is a minimum.
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