Tentukan volume gabungan bangun ruang tersebut,!

Jawaban:

jari² tabung = jari² kerucut

r = 7 cm

tinggi tabung (t₁) = 20 cm

tinggi kerucut (t₂) = 35 – 20 = 15 cm

volume bangun

v = volume tabung + volume kerucut

v = (π r² t₁) + (1/3 x πr²t₂)

v = πr² (t₁ + t₂/3)

v = (22/7 x 7²){20 + 15/3)

v = (22 x 7)(20 + 5)

v = 154 x 25

v = 3850 cm²