A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 243
j— of a round bar of iron f 3 3 9 .7854 X 9 = 70.686 area _t_. Fig. 48 Example. What area of metalis there in a section of a tubewhose inside diameter is 5 inches and the thickness oftube is \ inch? (Fig. 49.) 230 A HAND BOOK FOR MECHANICS In this case, as the inner diameter is 5 inches and thetube… … Fig. 49 Now find the difference between the two areas.5 25 X .7854 = 19.6350 area of inside diameter. 5.55.5275 275 30.25 X .7854 = 23.758350 area of outside diameter.19.6350 4.123350 area. Ans. Example. The inner diameters of an elliptical tubeare 3 feet and 4 feet, and the thickness of metal is J…
Mechanics · Arithmetic · Measurement
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