The Richest and Most Famous Private Chef in the World Joseph Donon: Gilded Age Dining with Flor

The Richest and Most Famous Private Chef in the World Joseph Donon: Gilded Age Dining with Flor

Matematika QUIZ #220

Tentukan Panjang Dari Unsur Kerucut Yang Ditanyakan​​

QUIZ #220

Tentukan Panjang Dari Unsur Kerucut Yang Ditanyakan​​

Jawaban:

1. L = 180π

d = 16 cm ---> r = 8 cm

t.....?

L = πr² + πrs

180π = πr(r + s)

π ruas kanan dan kiri dicoret sehingga

180 = r(r + s)

180 = 8(8 + s)

180/8 = 8 + s

22,5 = 8 + s

s = 22,5 - 8

s = 14,5

t = √s² - r²

t = √(14,5)² - (8)²

= √210,25 - 64

= √146,25

t = 12,09 cm

2. V = 150π

d = 15 cm ---> r = 7,5 cm

t.....?

V = 1/3 πr² t

150π = 1/3 x π x (7,5)² x t

π ruas kanan dan kiri dicoret sehingga

150 = 1/3 x (7,5)² x t

150 x 3 = 56,25 x t

t = (150 x 3)/56,25

t = 8 cm

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