Penjelasan dengan langkah-langkah:
1. kerucut
r = 9
t = 40
s = V402 + 9^2 = V481 = 41
luas permukaan = alas + selimut
= (phi x r^2 ) + phi x r x s
= phi. r^2 + phi. r.s
= phi. r (r + s)
= 3,14 × 9 × (9+41)
= 3,14 × 9 x 50
= 3,14 × 450
= ........... ( kalkulasi sendiri yya )
2. kerucut
t = 12
d = 28
r = 1/2 d = 1/2 × 28 = 14
volume = 1/3 × phi x r^2 × t
= 1/3 × 22/7 × 14 x 14 x 12
= 22 x 2 x 14 x 4
= 44 x 56
= ........ dihitung sendiri ..
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Penjelasan dengan langkah-langkah:
1. kerucut
r = 9
t = 40
s = V402 + 9^2 = V481 = 41
luas permukaan = alas + selimut
= (phi x r^2 ) + phi x r x s
= phi. r^2 + phi. r.s
= phi. r (r + s)
= 3,14 × 9 × (9+41)
= 3,14 × 9 x 50
= 3,14 × 450
= ........... ( kalkulasi sendiri yya )
2. kerucut
t = 12
d = 28
r = 1/2 d = 1/2 × 28 = 14
volume = 1/3 × phi x r^2 × t
= 1/3 × 22/7 × 14 x 14 x 12
= 22 x 2 x 14 x 4
= 44 x 56
= ........ dihitung sendiri ..