V = ?
а = 6 1/4 см длина
b = 6 1/4 * 1 3/5 = 25/4 * 8/5 = 5/1 * 2/1 = 10 см ширина
c = 6 1/4 * 36% = 25/4 * 36/100 = 1/1 * 9/4 = 9/4 см высота
V = a * b * c = 6 1/4 * 10 * 9/4 = 25/4 * 10 * 9/4 = 2250/16 = 140 10/16 =
= 140 5/8 куб.см объем
3 3/8 * 1 1/19 + 1 1/19 * 1 7/12 - 4 1/6 * 1 1/19 = 1 1/19 * (3 3/8 + 1 7/12 - 4 1/6) = 1 1/19 * (3 9/24 + 1 14/24 - 4 4/24) = 1 1/19 * 19/24 = 20/19 * 19/24 =
= 20/24 = 5/6