Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...revolutions will a wheel 4 ft. 8 in. in diameter make in going the same distance? 15. The weight of a sphere of given material varies as the cube of the radius. If a sphere having a diameter of 3 in. weighs 4 lb., find the weight of a sphere of the same material, but with a radius of 2 in. 16. The rents of an estate should be divided between A and B in the ratio of 4:5. However, A is paid $ 250, and B is paid $ 275. Which has been overpaid, and how much? 17. If a train, whose speed is 55 miles per hour, makes a certain trip in 3A hr., how long will it take a slower train to travel f of that distance, its speed being to that of the fast train, as 4 is to 9? 18. If the pressure p exerted upon the air in a bicycle pump and the volume of the air v obey Boyle's law, according to which pv = constant, and if the pressure is 25 lb. per square inch when the volume is 27 cubic inches, what will the pressure be when the volume is reduced to 20 cubic inches? 19. Part of the expenses of a certain school was fixed; part of them varied with the number of pupils. If the yearly expenses were $ 75,000 when the number of pupils was 710, and $ 85,000 when the number of pupils had increased to 900, find the yearly expense when the number of pupils was 800. 20. If the ratio ot3x + ytoix--3y equals the ratio of 21 to 2, what is the ratio of x to y? 21. At the end of 12 days, 15 men finish one fourth of a piece of work. How many additional men must be engaged in order to complete the remaining work in 18 days? H 22. If a body falls from rest through a distance of 16.1 feet during one second, how far will it fall in 8.3 seconds? 23. Compare the intensity of illumination of the page of a book at a distance of 6.3 feet from a source of light with the intensity at a...
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