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anmol mishra

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· 1 Months ago

Your site is worst (Question: 111691.0 )

Your website went under maintenance and my answers did not get saved..it automatically submitted my test... whose fault is that???????? you r robbing us off our money

Question:

The base of a pyramid is an equilateral triangle of side 1 m. If the height of the pyramid is 4 m, then the volume is:

Options:
A) 0.550 m3
B) 0.577 m3
C) 0.678 m3
D) 0.750 m3
Solution:
Ans: (b)

Volume of pyramid

= \(\cfrac{1}{3}\) (area of triangular base) × height

= \(\cfrac{1}{3}\times\left ( \begin{matrix}\cfrac{\sqrt{3}}{4}\times 1^2\end{matrix} \right )\times4\)

= \(\cfrac{1}{\sqrt{3}}\)  = 0.577 m3

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