The volume of a pyramid with height 15cm is 90cm3. If its base is a rectangle with dimension xcm by 6cm, find the value of x
-
A.
3 -
B.
5 -
C.
6 -
D.
8
Correct Answer: Option A
Explanation
Volume of pyramid = (frac{1}{3})lbh
90 = (frac{1}{3} times x times 6 times 15)
x = (frac{90 times 33}{6 times 15})
= 3