Question 145636
The volume is:
{{{PI*r^2*h/2}}} where h is the length. It's divided by 2 since it's a hemisphere.
V = {{{PI*.645^2*4/2}}} (in cubic meters)
V = 2.614 cubic meters
Water weighs 1 gram per cc, or 1 kg per liter. A cubic meter is 1000 liters.
V = 2614 liters, so the weight is:
W = 2614 kg