Question

A volcano shaped like a cone has a diameter of 10 km and height of 4 km. Sam estimates that 1/4 of the volcano js filled with lava. About how much lava is inside the volcano? Use 3 for pi.

Answer 1

Volume of a cone = (1/3)*pi*r^2*h
r=d/2
so solve for the volume and then divide your answer by four because only a fourth of the volcano is filled with lava
does that explain it?

Answer 2

so 26 km ^3?

Answer 3

if you are using pi=3 then its something like this
(1/3)*3*(10/2)^2*4=100km^3 now divide that by 4 and you get
25km^3

Answer 4

i used a calc and got 26

Answer 5

but mk.

Answer 6

because the pi doesn't equal 3, but when we use 3 for pi its how i showed you above
using pi=3.14 the answer is 26.1799

Answer 7

Thanks:)

Answer 8

np