. Complete arithmetic . EXERCISE 129 Find the volumes of rectangular solids having the fol-lowing dimensions: 7. 124 ft., 6 ft., 1 ft. 9 in. 8. 135 ft., 5 ft., 2 ft. 2 in. 9. 275 ft., 4 ft., 1 ft. 10 in. 10. 2 ft. 6 in., 3 ft., 4 ft. 8 in. 11. 6 ft. 2 in., 2 ft., 3 ft. 9 in 12. 4 ft. 3 in., 7 ft., 6 ft. 2 in. 1. 17 2. 16 3. 15 4. 17 5. 15 , 19, 32., 22, 27. 16, 34., 19, , 12. 6. 127, 6, IV. RECTANGULAR SOLIDS 237 13. What is the volume of a cube 16 in. on an edge ? 14. How many cubic feet of air are there in a schoolroom28 ft. long, 20 ft. wide, and 14 ft. high ? 15. What is the total are
. Complete arithmetic . EXERCISE 129 Find the volumes of rectangular solids having the fol-lowing dimensions: 7. 124 ft., 6 ft., 1 ft. 9 in. 8. 135 ft., 5 ft., 2 ft. 2 in. 9. 275 ft., 4 ft., 1 ft. 10 in. 10. 2 ft. 6 in., 3 ft., 4 ft. 8 in. 11. 6 ft. 2 in., 2 ft., 3 ft. 9 in 12. 4 ft. 3 in., 7 ft., 6 ft. 2 in. 1. 17 2. 16 3. 15 4. 17 5. 15 , 19, 32., 22, 27. 16, 34., 19, , 12. 6. 127, 6, IV. RECTANGULAR SOLIDS 237 13. What is the volume of a cube 16 in. on an edge ? 14. How many cubic feet of air are there in a schoolroom28 ft. long, 20 ft. wide, and 14 ft. high ? 15. What is the total area of the six faces of a rectangu-lar solid 8 in. by 7 in. by 5 in. ? 16. What is the total area of the six faces of a rectangu-lar solid 3 ft. 6 in. by 2 ft. 4 in. by 1 ft. 9 in. ?. 17. These children are measuring an excavation, and findit to be 6 ft. 2 in. wide, 8 ft. 4 in. long, and 4 ft. 3 in. it to be practically rectangular, how many cubicfeet of earth have been removed ? 18. What is the weight of the water in an aquarium1 ft. 4 in. long and 1 ft. wide, the water being 9 in. deep, ifa cubic foot of water weighs 62^ lb. ? 19. What is the weight of a block of marble 4 ft. 6 , 2 ft. wide, and 1 ft. 4 in. thick, marble being timesas heavy as water, and a cubic foot of water weighing 62 J lb. ? 20. A rectangular solid is 4 ft. 6 in. long and 2 ft. 8 , and the volume is 72 cu. ft. What is the height ? 21. A rectangular solid is 6 ft. 4 in. long and 3 ft. 9 , and the volume is 285 cu. ft. What is the height ? 22. A rectangular solid is 2 ft. 6 in. high and the volumeis 240 cu. in. What is the area of the base ? 238 PRACTICAL MEASUREMENTS 243. Brick Work and Stone Work. The number of bricksrequired for walls is estimated by th
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