well for no. 1 you will need to use the formula for the volume of a sphere
which is
V= 4/3r^3 (someting like that) sub the values in and solve for r
for a sphere, the volume is given by
where is the radius. you are given V, so we have:
just solve for
The volume of a cone is given by:2. How can I find the height of this? A cone-shaped unit holds 5000 cubic metres (m^3). The radius is 15 metres.
where is the radius and is the height.
you are given V and r, so we have:
just solve for
The surface area for a sphere is given by:3. How do I calculate the surface area and volume of the following spheres:
a) The sphere has a radius of 10cm.
b) The sphere has a radius of 5cm.
c) The sphere has a radius of 15.2cm.
d) The sphere has a radius of 20cm.
where is the radius. just plug in the value of r for each and solve for S
do the same for the volume. i gave you the formula earlier