The names of the months, called calendar months, and the number of days in each are: NOTE 1. The number of days in each month may be easily re membered by committing the following lines: — "Thirty days hath September, 144. According to the Gregorian Calendar, by which we reckon time, there is a leap year whenever the number representing the year (A. D.) is divisible by 4 and not by 100, and also when it is divisible by 400. Thus, 1892 was a leap year, 1894 not, 1600 was a leap year, 1700 and 1800 not. 145. ORAL EXERCISES. 44. How many days in 3 weeks? In 4 weeks? 45. How many hours in 2 days? In 3 days? 46. How many minutes in 4 hours? In 5 hours? 47. How many weeks in 35 days? In 56 days? 48. Was 1880 a leap year? 1881? 1882? 1894? 49. How many days were there in Feb. 1896 ? 50. How many days are there in June, July, and August? 51. How many hours are there from March 31, 9 P. M., to April 1, 8 A. M. ? 52. How many days are there from Aug. 16 to Sept. 5? 146. WRITTEN EXERCISES. 53. How much will it cost to build a fence a distance of 25 rods and 5 feet, on both sides of a road, at $0.42 a foot? 54. How many steps, of 21 feet each, must a man take to walk half a mile? 55. The top of Mt. Cotopaxi is 18875 feet above the level of the sea. What is its height in miles? 56. How many yards in a mile? 57. How many square feet in the four sides of a room 15 feet long, 10 feet wide, and 8 feet high? 58. How many square feet in an acre? 59. At $75 an acre, what will 5 acres and 50 square rods of land cost? 60. What will it cost for a carpet for a room 18 feet long and 12 feet wide, if the carpet is a yard wide and costs $0.90 a yard? 61. What will it cost to make a blackboard 15 feet long and 4 feet wide, at $0.09 a square foot? 62. How many square feet are there in a rectangular lot of land 150 feet long and 35 feet wide? NOTE. A Board Foot is a square foot one inch in thickness. This is the unit for measuring lumber, or sawed timber. When lumber is more than an inch in thickness, the number of board feet is found by muling the square feet in the surface of one face by the number expressing the number of inches it is in thickness. Boards less than an inch in thickness are reckoned as though they were an inch in thickness. 63. How many feet, board measure, in a plank 12 feet long, 15 inches wide, and 24 inches thick? (12 × 11 × 21) bd. ft. = 371 bd. ft. Ans. 64. How many feet board measure in a board 16 feet long, 15 inches wide, and inch thick? 14 Ans. 20 bd. ft. 65. How many feet board measure in 25 boards, each 13 feet long, 14 inches wide, and 14 inches thick? 66. How many feet board measure in 10 pieces of timber, each 35 feet long, 6 inches wide, and 4 inches thick ? 67. How many feet board measure in 4 boards each 15 feet long, 18 inches wide, and inch thick? 68. Find the cost of a lot of land containing half an acre, at $0.17 a square foot. 69. How many cubic inches of air in a room 35 feet long, 20 feet wide, and 11 feet high? 70. At $6 a cord, what will 17 cords and 5 cord feet of wood cost? 71. How many cords of wood are there in a pile 24 feet long, 4 feet wide, and 5 feet high? 72. If a family use 2 quarts and 1 pint of milk a day, how many quarts will they use in the three spring months? 73. A marketman sold 8 bushels, 3 pecks, 5 quarts of strawberries at $0.15 a quart. What did he receive for them? 74. At 6 cents a pound, how many tons of rice can be bought for $180? 75. What will 1540 pounds of hay be worth at $18 a ton? 76. If a horse eats 25 pounds of hay a day, how many tons will he eat in a year of 365 days? 77. How many hours are there in a year of 365 days? 78. How many minutes are there in January? 79. How many hours are there in March, April, and May? 80. Find the exact number of days from June 16, 4 P. M., to Sept. 9, 10 A. M. June 16, 4 P. M., to July 16, 4 P. M., "Aug. 16, July 16, " 66 66 66 66 Days. Hours. 30 66 Sept. 9, 10 A. M., 0 18 Ans. 84 18 81. Find the exact number of days from April 21, 8 A. M., to Aug. 29, 4 P. M. 82. Find the exact number of days from Dec. 19, 1894, 5 P. M., to March 8, 1895, 8 A. M. 83. What is the difference of time between April 17, 1892, and Oct. 9, 1895? SOLUTION. From April 17, 1892, to April 17, 1895, is 3 years; from April 17 to Sept. 17 is 5 months; Sept. 17 to Sept. 30 is 13 days; and from Sept. 30 to Oct. 9 is 9 days. Hence, from April 17, 1892, to Oct. 9, 1895, is 3 yrs. 5 m. 22 d. Ans. Hence, to find the difference of time between two dates, Rule. Find the number of complete years, then the number of complete calendar months, and then the remaining days. 84. What is the difference of time between July 19, 1893, and Oct. 4, 1895? 85. What is the difference of time between Aug. 30, 1891, and May 17, 1895 ? 86. What is the difference of time between Dec. 18, 1894, and Feb. 7, 1895 ? 87. How long was it from the death of Daniel Webster, Oct. 24, 1852, to the death of Abraham Lincoln, April 15, 1865? 147. ORAL EXERCISES. 1. How many inches are there in half a rod? 2. How many square feet are there in 6 square yards? 3. How many square inches are there in a bookcover 5 inches wide and 8 inches long? 4. How many cubic feet are there in a cubical block of stone 7 feet long, 3 feet wide, and 11⁄2 feet thick? 5. How many gallons are there in 33 quarts? 6. If a bushel of apples is worth $1.60, what is half a peck worth? 7. How many gills are there in 5 quarts? 8. How many tons are there in 6000 pounds? 9. At 12 cents a pound, what should be paid for 8 pounds of nuts? 10. How many days are there in 8 weeks? 11. How many days were there in February, 1892 ? 1893? 1894 ?. 12. How many hours are there from July 31, 3 P. M., to Aug. 2, 11 A. M.? 13. At $6 a ton, what will 55 tons of coal cost? 14. At $8.40 a cord, what will 2 cords and 2 cord feet of wood cost? 15. In 45 gills how many pints? 16 16. How many quarts are there in of a bushel? 17. If of a pound of sugar costs 3 cents, what will 5 pounds and 4 ounces cost? 18. What part of a bushel is 8 quarts? 19. How many cords are there in 28 cord feet? 20. How many square rods are there in of an acre? 21. How many inches are there in 14 yards? 22. What part of a ton is 1200 pounds? |