" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
t tabung = 25cm
Ltabung = (2 x La) + (Lselimut)
= (2 π r²) + ( 2 π r t)
= ( 2 x 3,14 x 20 x 20 ) + ( 2 x 3,14 x 20 x 25 )
= 2512 + 3140
= 5652 (D)
2. r alas kerucut = 8cm
t kerucut = 15cm
s² = 8² + 15²
= 64 + 225
= √289 = 17cm
Lkerucut = π r ( s + r )
= π . 8 ( 17 + 8 )
= π . 8 . 25
= π 200
= 200π (D)
semoga membantu