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⇒π·5·s = 65π
5s = 65
s = 65/5
s = 13
⇒t = √s²-r²
= √13²-5²
= √169 - 25
= √144
= 12
⇒V = 1/3 πr²t
= 1/3 x π x 5 x 5 x 12
= 100π cm³
10. t = √s²-r²
= √13²-5²
= √169 - 25
= √144
= 12
⇒ V = 1/3 πr²t
= 1/3 x 3,14 x 5 x 5 x 12
= 314 cm³
11. πd = 88
22/7 d = 88
d = 88 x 7/22
d = 28
⇒ d = 28
r = 28 : 2 = 14
⇒ V = πr²t
= 22/7 x 14 x 14 x 20
= 12320
maaf klo salah :)