tolong bantu jawab nomer 2 sama caranya

a. [tex] \frac{1}{3} [/tex] × 8 × 8 × 9
   = 64 ×3 = 192
b. [tex] \frac{1}{3} [/tex] × 16 × 16× 13
   = [tex] \frac{1}{3} [/tex] × 256 × 13 = [tex] \frac{3328}{3} [/tex] = 1109.33
c. [tex] \frac{1}{3} [/tex] × 25 × 25 × 4
   = [tex] \frac{1}{3} [/tex] × 25 × 100 = [tex] \frac{2500}{3} [/tex] = 833, 33