Answer: 20 cm ^2 (20 cm squared)
Explanation:
This is a rectangular prism so Volume = Length(Width)(Height)
You only know the height and Volume so you do :
60 = L(W)(3) :then bring the 3 over:
60/3 = L(W)
20 = L(W)
Since area = L(W)
20 is your answer.