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#1

$Old$ October 22nd, 2009, 05:22 PM

stern4488 $stern4488 is offline$

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$Default$ Need help in calculating the volume of a cone

Help please. Need volume of cone. IF it base is 30 cm and is 45 cm tall. What is the volume? What is the caluclation you used?

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$Old$ October 22nd, 2009, 06:22 PM

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Help please. Need volume of cone. IF it base is 30 cm and is 45 cm tall. What is the volume? What is the caluclation you used?

$V = \frac{\pi}{3} r^2 h$

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$Old$ October 23rd, 2009, 05:26 AM

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Originally Posted by stern4488 $View Post$

Help please. Need volume of cone. IF it base is 30 cm and is 45 cm tall. What is the volume? What is the caluclation you used?

The area of the base of the cone is the area of a circle:
$A = \pi r^2$

The Volume of a cone is one third of the area of the base x the height of the cone:
$V =\pi r^2 \; h \; \frac{1}{3}$

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