tolong jawab pakai cara ya,,, yang nomor 30

voume 1/2 tabung = 1/2 .22/7.r².t
                               = 1/2.22/7.7.7.20 = 1540
volume balok = p.l.t = 20.14.10 = 2800
volume bangun tersebut = 1540 + 2800 = 4340

#maafkalosalah

V = Vsetengah tabung + Vbalok
V = (1/2 x π x r² x t) + (p x l x t)
    = (1/2 x 22/7 x 7² x 20) + (14 x 10 x 20)
    = (154 x 10) + (2800)
    = 1540 +  2800 = 4.340 cm²