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.
(21cm3, 3cm3) -
B.
(24cm3, 3cm3) -
C.
(24cm3, 21cm3) -
D.
(72cm3, 9cm3) -
E.
(63cm3, 9cm3)
Correct Answer: Option B
Explanation
Vol. of the 1st section is side x height
vol. = 3 x 8
= 24cm3
vol. of the second section is 3 x 1 = 3
= 24cm3, 3cm3