2,5 m = 25 dm
Pertama cari tinggi kerucut terlebih dahulu:
t² = s² - r²
t² = 25² - 7²
t² = 576
t = 24
Kedua cari volume kerucut:
V = 1/3 × πr² × t
V = 1/3 × 22/7 × 7² × 24
V = 1/3 × 22/7 × 49 × 24
V = 8 × 22 × 7
V = 1.232 dm³
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2,5 m = 25 dm
Pertama cari tinggi kerucut terlebih dahulu:
t² = s² - r²
t² = 25² - 7²
t² = 576
t = 24
Kedua cari volume kerucut:
V = 1/3 × πr² × t
V = 1/3 × 22/7 × 7² × 24
V = 1/3 × 22/7 × 49 × 24
V = 8 × 22 × 7
V = 1.232 dm³