Problem:
A truck travels 6b​ feet every t seconds. There are 3 feet in a yard. How many yards does the truck travel in 3 minutes?
Answer Choices:
A. 1080tb​
B. b30t​
C. t30b​
D. b10t​
E. t10b​
Solution:
The truck travels for 3⋅60=180 seconds, at a rate of 6tb​⋅31​ yards per second. Hence the truck travels 180⋅6tb​⋅31​=(E)t10b​​ yards.
The problems on this page are the property of the MAA's American Mathematics Competitions