tolong dibantu jawab

a. t² = s²- r²
=17²-8²
= 289 - 64
= √225
= 15 cm
b.luas selimut = μ . r. s
=3,15*8*17
= 427,04 cm²
c. luas alas =μ * r²
=3,14*8² = 3,14 * 64 = 200,96 cm²
d. luas permukaan = μ* r * ( s + r)
= 3,14 * 8*(8+17)
= 3,14 * 8 * 25
= 628cm²

maaf klau ada yg sslah