Math in the Workplace - Measurements
ADA COUNTY HIGHWAY DISTRICT
Road Right-of-Way Management
Pavement Management Technician
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Job Description: Inspects pavement, calculates asphalt
estimates and reports inspection data to the ACHD maintenance department. |
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Problem:
The Ada County Highway District Pavement Management Technician needs to know how many tons of asphalt will be needed on a section of road. The section of road measures 5,280 feet (1 mile) in length and 26 feet wide. The asphalt needs to be 3 inches in depth. Asphalt weighs 144 tons per 2,000 ft3.
ADA COUNTY HIGHWAY DISTRICT |
Solution:
3 inches · (1 foot 
12") = ј foot or .25 ft
144 tons 2000 ft3 = .072 tons of asphalt per cubic foot
length · width · depth · weight per ft3 = tons of asphalt
5,280 ft x 26 ft x .25 ft x .072 tons = 2,471 tons of asphalt needed