ANSWERS TO PROBLEMS 257 



766. $196.74. 767. $7,870. 768. $106.54. 769. $15,000. 770. 

 750,000,000. 771. 125.000,000. 772. $:^7,500,000. 773. 41,666,- 

 666.6. 774. ;;.200. 775. 96,000. 776. 38,400,000. 777. $360. 

 778. 1,500; $60. 779. $9.40. 780. $134. 781. $102. 783. 102,000 

 pounds; 96,000 pounds; 84,000 pounds; 66,000 pounds. 784. 

 25.71 square inches; 5.1 inches; 5^4 inches. 785. 4.75 inches. 

 787. 560 i)()unds; 248.8 pounds; 2^4 times as strong. 788. 77.8 

 pounds. 789. 222 pounds. 790. 1,020 pounds; 960 pounds. 791. 

 312.5 pounds. 793. 1,600 pounds; 710 pounds. 794. 7.14 inches; 

 4 planks bolted together. 795. 71 pounds. It would, of course, 

 stand many times this weight. 796. 67 pounds. 797. 62 pounds; 

 250 pounds ; 560 pounds. 798. 76 ixnnids ; 64 pounds ; 76 pounds. 

 799. 23.2 feet. 800. 9.1 inches. 801. 12 inches, if yellow pine, 

 to carry 1.5 tons. 



CHAPTER XVII 



802. lYi. 803. 41^. 805. 53 1-3. 808. 47 feet. 8 inches. 811. 

 1,620. 812. 3,020.8. 813. 5 feet 2 inches. 814. 5 feet 10 inches. 

 815. 115. 816. 5 feet. 817. 30.6. 818. 5.83 feet. 819. 7 feet 

 6 inches. 820. 200. 821. 288. 822. 32.7. 823. 59.6. 824. 2. 

 825. 3K>. 826. 1.113. 827. $7.80. 828. 17 cents. 829. 20.4 cents. 

 830. 21 cents. 831. 24.9 cents. 832. $58.40. 833. $36.50. 836. 

 1.96 acres. 837. 800. 838. 2.38. 839. 3.32. 840. $17..50. 841. 

 4.59. 842. 12.91. 843. 10.37. 844. 10.00. 845. 6.68. 846. 2.76. 

 847. 14.54. 848. 1.10. 849. 15.49. 850. 78.44. 



CHAPTER XVIII 



851. 2.2. 852. 6.9. 853. 9; 4.5 when tamped. 854. 2.96; 0.74 

 cubic yards. 855. 0.5 cubic yards. 857. 3; 5.5. 858. 1,300 feet. 

 859. 10.2 cubic yards exclusive of foundation. 860. 2.8 cubic 

 yards for roof and ends. 861. 154 cubic yards. 862. \\'ith 6 

 inch ends added — 1.8 cubic yards; 1.8 cubic yards. 864. 15.4 

 sacks; 1.6 cubic yards; 3.3 cubic yards; 12.6 sacks; 1.7 cubic 

 yards; 3.4 cubic yards. 865. $13.89. 866. $11.76. 867. 680 

 sacks. 868. 11.4 sacks. 



