Question
What is the volume in cubic cm of a pyramid whose area of the base is 25 sq cm and height 9 cm ?
Answer: Option B
Volume of pyramid :$$\eqalign{
& = \frac{1}{3} \times {\text{Area of base}} \times {\text{Height}} \cr
& = \left( {\frac{1}{3} \times 25 \times 9} \right){\text{c}}{{\text{m}}^3} \cr
& = 75\,{\text{c}}{{\text{m}}^3} \cr} $$
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Volume of pyramid :$$\eqalign{
& = \frac{1}{3} \times {\text{Area of base}} \times {\text{Height}} \cr
& = \left( {\frac{1}{3} \times 25 \times 9} \right){\text{c}}{{\text{m}}^3} \cr
& = 75\,{\text{c}}{{\text{m}}^3} \cr} $$
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