diameter lingkaran alas yang kelilingnya 88

[tex]K =2 \times \pi \times r \\ 88 = 2 \times \frac{22}{7} \times r \\ 88 = \frac{44}{7} \times r \\ r = 88 \times \frac{7}{44} = 14[/tex]
sehingga
[tex]d = 2 \times r = 2 \times 14 = 28[/tex]