Some question: Right triangle PQR is the base of the prism in the figure above. If PQ=PR=5 and the height of the prism is 10, what is the volume of the prism?
Options:
(A) 5
(B) 10
(C) 15
(D) 20
(E) 25
Some stream of consciousness:
Volume of prism = Area of base * height = 1/2* (square root of 5) * (square root of 5)*10 = 25 The answer: (E).