The perimeter of one face of a cube is 20 cm. Its volume will be:  Pick.
A) 125 cm 3 B) 400 cm 3 C) 250 cm 3 D) 625 cm 3 E) none of these

Rationale: "explanation : edge of cude = 20 / 4 = 5 cm volume = a * a * a = 5 * 5 * 5 = 125 cm cube option a"
Answer: A