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12-100hw1

# 12-100hw1 - 12-100 Introduction to Civil and Environmental...

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12-100 Introduction to Civil and Environmental Engineering Spring 2008 Homework 1. Due: 23 January 2008 Unless instructed otherwise, assume all quantities are given to three significant figures. Some problems require you to perform unit conversions, and you must find the appropriate factors. Follow the homework preparation guide that is part of the Course Description document. 1. (a) Convert a speed of 60 mi/hr into ft/s. (b) A cone has a diameter of 1 m and a height of 2.5 m; determine its volume in ft 3 . (c) Convert a flow rate of 240 gpm (gallons/min) into a flow rate in CFS (ft 3 /s). (d) A circular roof with a radius of 32.5 ft is covered with soil to a depth of 4 in to create a green roof. The unit weight of the soil is 75 lb/ft 3 . How many tons of soil are required? 2. A cylindrical storage tank at a gas station has a radius of 22.0 ft and a height of 12.5 ft. If the average gasoline purchase is 8.16 gallons, and an average of 293 cars purchase gasoline every day, how many days will the supply last?

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12-100hw1 - 12-100 Introduction to Civil and Environmental...

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