25 cm
7 cm
20 cm
a)
d² = p² - (R + r)²
20² = 25² - (R + 7)²
400 = 625 - (R + 7)²
(R + 7)² = 625 - 400
(R + 7)² = 225
R + 7 = √225
R + 7 = 15
R = 15 - 7
R = 8 cm
b)
l² = p² - (R - r)²
= 25² - (8 - 7)²
= 25² - 1²
= 625 - 1
= 624
l = √624
= √(16 x 39)
= 4√39 cm
Penjelasan dengan langkah-langkah:
SOAL NO 8
V balok 1
= p × l × t
= 12 × 5 × 5
= 12 × 25
= 300 cm³
V balok 2
= 18 × 5 × 6
= 18 × 30
= 540 cm³
V gabungan
= 300 + 540
= 840 cm³
semoga bermanfaat
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25 cm
7 cm
20 cm
a)
d² = p² - (R + r)²
20² = 25² - (R + 7)²
400 = 625 - (R + 7)²
(R + 7)² = 625 - 400
(R + 7)² = 225
R + 7 = √225
R + 7 = 15
R = 15 - 7
R = 8 cm
b)
l² = p² - (R - r)²
= 25² - (8 - 7)²
= 25² - 1²
= 625 - 1
= 624
l = √624
= √(16 x 39)
= 4√39 cm
Penjelasan dengan langkah-langkah:
SOAL NO 8
V balok 1
= p × l × t
= 12 × 5 × 5
= 12 × 25
= 300 cm³
V balok 2
= p × l × t
= 18 × 5 × 6
= 18 × 30
= 540 cm³
V gabungan
= 300 + 540
= 840 cm³
semoga bermanfaat