The perimeter of one face a of cube is 20 cm. Its volume must be
Select:
A) 125 cm 3 B) 400 cm 3 C) 1000 cm 3 D) 8000 cm 3 E) none

Rationale: solution edge of the cube = ( 20 / 4 ) cm ‹ = › 5 cm . volume = ( 5 × 5 × 5 ) cm 3 ‹ = › 125 cm 3 . answer a
Answer: A