You can put this solution on YOUR website! The formula to use is:
V = (4/3)pi(r^2), where V = volume measured in cubic units, pi = 3.14 and
r = radius of 4 meters.
We plug and chug:
V = (4/3)(3.14)(4^2)
V = (4/3) times (3.14) times (16)
V = 66.99 meters^3
Did you follow?
NOTE: I rounded to two decimal places.