If an ice block 10 centimeters on each side was melted,how much would it raise the water level in a tank that is 100 centimeters long by 40 centimeters wide?

Question

Quizplus · Accepted Answer

The volume of the ice block is 10 x 10 x 10 = 1000 cubic centimeters. When it melts, it will occupy the same volume but as water. Therefore, it will add 1000 cubic centimeters of water to the tank. 
The tank has a surface area of 100 x 40 = 4000 square centimeters. To find out how much the water level will rise, we divide the added volume by the surface area:
1000 cubic centimeters / 4000 square centimeters = 0.25 centimeters. 
Therefore, the water level will rise less than 0.5 centimeters. Choice A is the best answer.

If an Ice Block 10 Centimeters on Each Side Was