The height of a pyramid on square base is 15cm. If the volume is 80cm(^3), find the length of the side of the base

A.
3.3cm 
B.
5.3cm 
C.
4.0cm 
D.
8.0cm
Correct Answer: Option C
Explanation
Volume = (frac{1}{3} b^2 h)
(therefore b = sqrt{frac{3v}{h}})
(b = sqrt{frac{3(80)}{15}} )
(b = sqrt{16} = 4.0 cm)