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jawab

r kerucut = r tabung = 2 cm
t kerucut = t1 =  3,5 cm
t tabung = t2 = 4 cm

V benda = V kerucut + V tabung
V = 1/3 π r² t1 +  π r² t2
V =  1/3 π r² ( t1 + 3 t2)
V = 1/3 π (2²) (3,5 + 8)
V = 4/3 (11, 5) π
V = 48,15 cm³

berat benda = V x 11,4gram
Berat = 48,15 x 11,4 g = 548,91 g