Tolong banh kalau bisa pakai cara plis bgt​

Jawaban:

1. L = 2 x π x r x t

= 2 x 22/7 x 14 x 10

= 2 x 22 x 2 x 10

= 880 cm² ( b )

2. L = 2 x π x r x t

= 2 x 22/7 x 1,4 x 2,8

= 172,48 / 7

= 24,64 m² ( d )

3. L = π x r ( r + s )

= 22/7 x 10 ( 10 + 26 )

= 22/7 x 10 x 36

= 7.920 / 7

= 1.131,4 cm²