Question

Diketahui luas alas kerucut 314 cm². Jika panjang garis pelukisnya 26 cm maka volume kerucut tersebut adalah.... Cm³

Answer 1

La = πr²
314= 3.14 x r²
r²   = 314/3.14
r²   = 100
r    = √100
r    = 10 cm

vol = 1/3πr²t
    = 1/3 x 3.14 x 10 x 10 x 24 = 2512 cm³
# t = √s² - r²
   t = √26² - 10² = √676 - 100 = √576 =24 cm

Answer 2

L.alas = πr²
    314 = 3,14 × r²
       r² = 314/3,14
       r = √100 =10 cm
tinggi kerucut = 26²-10² =676-100 = √576 =24 cm
V = 1/3πr²t
   = 1/3x3,14x10²x24
   = 2512 cm³
semoga membantu