Question

tentukan volume gabungan berikut!!
nomor 1&2.
beserta caranyaa​

Answer 1

Jawab:

1)

d = 14 cm ⇒ r = 7 cm

t 1/2 bola = r = 7 cm

t tabung = 28 - 7 = 21 cm

V gab = V1/2 bola + Vtabung

= (1/2 x 4/3 x πr³) + (πr²t)

= (1/2 x 4/3 x 22/7 x 7 x 7 x 7) + (22/7 x 7 x  7 x 21)

= 718,66 + 3.234

= 3.952,66‬ cm³

2)

s kubus = 10 cm

r = 5 cm

t kerucut = 22 - 10 = 12 cm

V gab = V kerucut + V kubus

= (1/3 πr²t) + s³

= (1/3 x 3,14 x 5 x 5 x 12) + (10 x 10 x 10)

= 314‬ + 1000

= 1.314‬ cm³