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Verified answer
Diketahui :s = 50 cm
t = 48 cm
π = 3,14
Ditanya :
a. Jari Jari = ....?
b. Luas Selimut = ....?
c. Volume = ....?
Penyelesaian :
a. Jari Jari
r = √s² - t²
r = √50² - 48²
r = √2.500 - 2.304
r = √196
r = 14 cm
b. Luas Selimut
Luas Selimut = πsr
= 3,14 × 50 × 14
= 157 × 14
= 2.198 cm²
c. Volume
Volume = ⅓ × π × r² × t
= ⅓ × 3,14 × 14² × 48
= ⅓ × 3,14 × 196 × 48
= ⅓ × 3,14 × 9.408
= ⅓ × 29.541,12
= 9.847,04 cm³