150 гр * 54*250=2025кг
<span>Ответ:2025 кг </span>
X*0,7*0,4=2,94
x=2.94/0.28
x=10.5
7,2 * 2 1/12 : (15 1/5 - 11 1/2) =
1) 15 1/5 - 11 1/2 = 15 - 11 + 1/5 - 1/2 = 4 + 2/10 - 5/10 = 4 - 3/10 = 3 7/10;
2) 7,2 * 2 1/12 = 72/10 * (2 * 12 + 1)/12 = 72/10 * 25/12 = (12 * 6 * 5 * 5)/(5 * 2 * 12) = (6 * 5)/2 = 30/2 = 15;
3) 15 : 3 7/10 = 15 : 37/10 = 15 * 10/37 = 150/37 = 4 (150 - 148)/37 = 4 2/37.
468/576 = 117/144
234/288 = 117/144
360/630 = 36/63 = 4/7
180/2250 = 18/225 = 2/25