" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Lp = 616 cm²
Ditanya :
Lp?
Jawab :
Lp = 4 × π × r²
616 = 4 × × r²
196 = 4r²
49 = r²
r = √49
r = 7 cm
Lp = 2 × π × r × (r + t)
Lp = 2 × × 7 × (7 + 14)
Lp = 2 × 22 × 21
Lp = 924 cm² (B)