The square base of a pyramid of side 3cm has height 8cm. If the pyramid is cut into two parts by a plane parallel to the base midway between the base and the vertex, the volumes of the two sections are

A.
(21cm^{3}, 3cm^{3}) 
B.
(24cm^{3}, 3cm^{3}) 
C.
(24cm^{3}, 21cm^{3}) 
D.
(72cm^{3}, 9cm^{3}) 
E.
(63cm^{3}, 9cm^{3})
Correct Answer: Option B
Explanation
Vol. of the 1st section is side x height
vol. = 3 x 8
= 24cm^{3}
vol. of the second section is 3 x 1 = 3
= 24cm^{3}, 3cm^{3}