The Normal Elementary Geometry: Embracing a Brief Treatise On Mensuration And Trigonometry ...
The Normal Elementary Geometry: Embracing a Brief Treatise On Mensuration And Trigonometry ...
Edward Brooks
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= 6 inches. 13. The equal sides of an equilateral triangle are each 16 feet ; what is the side of the inscribed square ? Ans. 14. I have a plank 12 feet long which contains 15 square feet ; what is the width of each end, if they are as 2 to 3 ? Ans. 12 in. ; 18 in. 15. If the minute-hand of a clock is 6 inches long, over how much space does it pass in 40 minutes? Ans. 75.398 square inches. 16. What is the circumference of a circle whose diameter equals the diagonal of a square which contains 25... sq. rds. ? Ans. 22.211112. 17. What is the diameter of a wheel which makes 200 revolutions in a minute, when the cars are going 30 miles an hour ? Ana. 4J -j- feet. 18. A horse is fastened in a meadow, by a halter 20 feet long, to the top of a post 6 feet high ; what is the area of the circle over which he can graze ? Ans. 127.06 square yards. 19. Required the area of a circle in which the number expressing its area equals the number expressing its circumference. Ans. 12.5664. 20. The area of a circular park is 4 acres ; how long will it take to drive round it at the rate of 6 miles an hour ?
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