
Matematika Volume Tabung
Presentation
•
Mathematics
•
5th - 6th Grade
•
Hard
AGUS SUMPENA
Used 10+ times
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4 Slides • 5 Questions
1
Matematika Volume Tabung
By Agus Sumpena
2
Contoh 1 :
Sebuah tabung memiliki luas alas 120 cm2 dan tinggi 15 cm. Tentukan volume tabung tersebut !
Jawab :
Volume tabung = luas alas x tinggi tabung
Volume tabung = 120 cm2 x 15 cm
Volume tabung = 1800 cm3
3
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4
Contoh 2 :
Sebuah drum berbentuk tabung memiliki panjang jari-jari 42 cm dan tinggi drum 90 cm. Berapa volume drum tersebut ?
Jawab :
Volume tabung= Luas alas x tinggi tabung
Volume tabung = Luas lingkaran x tinggi
Volume tabung = π x r2 x t = π x r x r x t
Volume tabung = (22/7) x 42cm x 42 cm x 90 cm
Volume tabung = 22 x 6 cm x 42 cm x 90 cm
Volume tabung = 132 x 42 x 90 = 5544 x 90 = 498960cm2
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7
Contoh :
Sebuah tabung memiliki panjang diameter 8 cm dan tinggi 14 cm. Berapa volume tabung tersebut ?
Jawab :
Diameter = 20 cm maka jari-jarinya (r) = 8 : 2 = 4 cm
Volume tabung= Luas alas x tinggi tabung
Volume tabung = Luas lingkaran x tinggi
untuk memudahkan perhitungan gunakan π = 22/7 sebab meskipun jari-jarinya bukan kelipatan 7 tetapi tinggi tabung tersebut 14 cm yang merupakan kelipatan 7 oleh karena itu π = 22/7
Volume tabung = π x r2 x t = π x r x r x t
Volume tabung = (22/7) x 4cm x 4 cm x 14 cm
Volume tabung = 22 x 4 cm x 4 cm x 2 cm
Volume tabung = 88 cm x 4cm x 2 cm = 352 cm2 x 2 cm = 704 cm3
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Matematika Volume Tabung
By Agus Sumpena
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