Question

Jika jari-jari alas tabung 7 cm dan tinggi tabung 10 cm, maka volume bangun tersebut adalah....

Answer 1

V bangun = V tab + V kerucut
V bangun = (πr²t) + (1/3πr²t)
V bangun = (22/7.7².10) + (1/3.22/7.7².6)
V bangun = (1540) + (308)
V bangun = 1848

Answer 2

V = V1 + V2

V1 = V tabung
= L alas x t
= phi x r² x t
= phi x 7 x 7 x 10
= 22/7 x 7 x 7 x 10
= 1.540 cm³

V2 = V kerucut
= 1/3 x phi x r² x t
= 1/3 x 22/7 x 7 x 7 x 10
= 308 cm³

V = V1 + V2 = 1.540 + 308 = 1.848 cm³

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