Measurement

From Washington State 1996 Math Olympiad sponsored by WSMC
1). (2 points) A rectangular solid's dimensions are 12 feet by 14 feet by 15 feet. What is the surface area of the box?




Answer:__________

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2). (3 points) If a car travels at 20 mph for 2 miles and 40 mph for 8 miles, what is the average rate of speed in miles per hour?


Answer:__________


3). (3 points) The area of three faces of a rectangular solid are 72 square feet, 96 square feet, and 108 square feet. What are the whole number measures of the edges?


Answer:__________


4). (3 points) A lump of metal is submerged in a rectangular tank 20 cm x 15 cm, raising the water level .35 cm. What is the volume of the metal piece?


Answer:__________


5). (3 points) A freight train that is one kilometer long goes through a tunnel that is one kilometer long. If the train travels 15 kilometers per hour, how long will it take to pass through the tunnel?


Answer:__________