A) V = a * b * h = 12 * 7 * 4 = 336cm³

b) S1 = a * h = 12 * 4 = 48cm²

S2 = b * h = 7 * 4 = 28cm²

S3 = a * b = 12 * 7 = 84cm²

S = S1 + S2 + S3 = 84 + ( 28 * 2 ) + ( 48 * 2 ) = 84 + 56 + 96 = 236cm²

B) V = a * b * h = 80 * 60 * 40 = 192.000cm²

Ответ:

A) V = a * b * h = 12 * 7 * 4 = 336cm³

B) V = a * b * h = 80 * 60 * 40 = 192.000cm²

Пошаговое объяснение: