14-in. pipe. If the amount of water carr pendent on the area of cross section of th be each of the three pipes? 52. A weight is held by three rods each same weight is to be held by one rod what be as strong as the three rods together? 53. A hollow cast-iron column has inside of 12 in. and 16 in. respectively. If the col is its weight? 54. Find the net area (cross-sectional p shown in Fig. 84. Find the number of cub is 3% in. thick. What is its weight at .28 lb 55. Find the area in sq. in. of the crosssteam pipe shown in Fig. 85. 55a. Find the area of the eccentric cross 55b. Find the area of the ring section sh 56. Find the circumference of locomoti 80 in., and 82 in. in diam. 57. What distance would a locomotive each of the above cases if the number of r were 200 per min.? many revolutions did the is 80 in. 6"D FIG. 86. 60. A pulley is 3 ft. in d the rim of the pulley trav 61. The drivers on a loc miles per hr. will the loco turns a min.? 62. If the diameter of a do their areas compare? 63. Which will carry th four 1-in. pipes or one 4 and show all the calculatio 64. The total pressure pressure per sq. in. of piston on which the press 65. If a shaft 6 in. in d many turns a minute mus not exceed 60 ft. a min.? 66. What length of bel leys whose centers are 8 ft 67. What is the total p piston with a pressure of 8 68. A pulley 2 ft. in dia the rim of the pulley trav the amount of water to obtain a total pressure of r sq. in.? MENSURATI 41. Volume of Solid work on mensuration ments, length and wisquare feet and square to measure the volume or liquids we must ta only the length and thickness. Figure 88 shows a This is called a cubic i 1 ft. each way, known |