Tolong soal di atas di kerjakan pakai cara ya....

v. balok = p*l*t = 7*3,5*3,25 = 79,625 cm'2
v. 1/2tabung = 1/2 * pi* r * r * t = 1/2 * 22/7 * 7/2 * 7/2 * 3.5 = 67,375 cm'2
v. bangun : 79,625 + 67,375 = 147 cm'2