Its just the area of a circle
21 inches or 21 centimeters?
area of a circle is (pi)*r2 where pi = 3.1415.... and r = radius
thus A = (3.1415)*(diameter/2)2
u can figure out the answer from that with a calculator
Chat with our AI personalities
If radius=21 ft, then diameter = 2*radius = 42 ft
Volume of this pyramid is (area of base) x (height) / 3. The area of the base (square) is (edge)2 So (21 ft)2 * (18 ft)/3 = 26586 cubic feet
346
To find the diameter of a circle with a circumference of 66 inches, you can use the formula C = πd, where C is the circumference and d is the diameter. Rearranging the formula to solve for d, you get d = C / π. Plugging in the circumference of 66 inches, the diameter would be 66 / π ≈ 21 inches.
The volume of a cylinder is (pi) x (radius of the base)2 x (height)Radius = 1/2 diameterVolume of the tall tin-can you've described is (pi) x (21)2 x (96) = 133,002.5 cubic inches = 575.77 gallons. (rounded)That's the volume of the shape you described. We have no way of knowinghow much water may be in it at any given time. For all we know, it may beempty, or full of chicken feathers etc.