Question

Tolong ya itu bangun ruang kerucut cari volumenya dan LA=luas alas

Answer 1

No 4.
luas alas kerucut = πr²
= 3,14 × 5 × 5
= 78,5cm²
volume kerucut = ⅓ πr² × t
= ⅓ × 78,5 × 15
= 392,5cm³

no 5.
luas alas kerucut (lingkaran) = πr²
= 22/7 × 21/2 × 21/2
= 346,5 cm²
volume kerucut = ⅓ πr² × t
= ⅓ × 346,5 × 18
= 2079 cm³