The radius of a circular fish pond is 12 meters, and there is a circular island with a diameter of 10 meters in the middle. How many square meters is the water surface area of this fish pond

The radius of a circular fish pond is 12 meters, and there is a circular island with a diameter of 10 meters in the middle. How many square meters is the water surface area of this fish pond


Because (12 * 12-5 * 5) * 3.14 = 373.66 square meters, the water surface area of this fish pond is 373.66 square meters



The diameter of the small cylinder is 8cm, the width is 6cm, the radius of the large cylinder is 5cm, and its volume is 2.5 times that of the small cylinder, what is the height of the large cylinder
Solve by equation


The height of the large cylinder should be 9.6cm



How to calculate the volume of a cylinder with a height of 7cm on one side and 5cm on the other side and a diameter of 2cm on the bottom


After you draw the picture, draw the same picture on it, but the two oblique cuts face each other
Do you understand?
In any case, you describe the column, two into one
It is a general cylinder with a height of 12cm [5cm + 7cm]
Can you calculate the volume of a cylinder? The area at the bottom multiplied by the height~
Then divide it by 2 to get ~. [because it's two identical pieces of ~]