A cube of edge 5cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of vessel are 10cm * 5cm , find the rise in water level? Choose the correct option:
A) 2.5 cm  B) 3.6 cm  C) 5 cm  D) 6.43 cm  E) 7.56 cm

Rationale: "increase in volume = volume of the cube = 5 * 5 * 5 cm ^ 3 rise in water level = volume / area = 5 * 5 * 5 / 10 * 5 = 2.5 cm answer is a"
Answer: A