Question

Nomor 16 tolong ya...

Answer 1

V = 37.68 cm³
t = 4cm

v = 1/3 πr²t
37.68 = 1/3 . 3,14 . r² . 4
r² = (37.68 . 3) / (3,14 . 4)
r² = 9cm
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s² = r² + t²
s² = 9 + 16
s² = 25
s = 5

L permukaan kerucut = L lingkaran + L selimut
= πr² + πrs
= 3,14 * 9  + 3,14 * 3 * 5
= 28,26 + 47.1
= 75,36 cm²