Question

A volcanic plug shaped like a cone has a diameter of 25 km and a height of 3.9 km.

What is the volume of the plug?
Round your final answer to one decimal place and use 3.14 to approximate pi.

Answer 1

Volume of a cone of diameter D, height h:
`V=\frac{\pi}3*(\frac{D}2)^2*h`

Hence
`V=3.14/3*(25000/2)^2*3900=6.4*10^(11) m^3`