1. Diameter bola 42 dm

Penjelasan dengan langkah-langkah:

1.

v = 4/3 πr³

v = 4/3 × 22/7 × 21 × 21 × 21

v = 4/3 × 22 × 3 × 21 × 21

v = 4 × 22 × 21 × 21

v = 88 × 441

v = 38.808 dm³

v = 38.808 liter

2.

v = 1/3 × La × t

v = 1/3 × 176 × 18

v = 18/3 × 176

v = 6 × 176

v = 1.056 cm³