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A cylindrical measuring cylinder with a bottom radius of 5cm. Take a conical iron block out of the measuring cylinder and the water surface drops 3cm. What is the volume of this iron block?
V = sh, = 3.14 × 52 × 3, = 3.14 × 75, = 235.5 (cubic centimeter); a: the volume of this iron block is 235.5 cubic centimeter
A cylindrical bucket filled with water, the bottom radius is 5cm, and there is an iron block completely immersed in it. After the iron block is taken out, 3cm below the water, what is the volume of the iron block
Hello, Han yingnuan, it's for you
3.14×5^2×3
=235.5 (CC)
The volume of this iron block is 235.5 cubic centimeters
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If the height of a 5 cm cylinder increases by 3 cm, its surface area will increase by 18.84 square cm. What is the volume of the original cylinder?
The circumference of the bottom surface of the original cylinder is: 18.84 △ 3 = 6.28 (CM), the radius of the bottom surface of the original cylinder is: 6.28 △ 3.14 △ 2 = 1 (CM), the volume of the original cylinder is: 3.14 × 12 × 5 = 15.7 (cm3), a: the volume of the original cylinder is 15.7 cm3
The surface area and volume of circular column with bottom radius of 1.5cm and height of 5cm are calculated
Write the formula
What's the bottom area
1.5 × 1.5 × 3.14 = 7.065 square centimeter
What is the lateral area
1.5 × 2 × 3.14 × 5 = 47.1 square centimeter
What is the surface area
7.065 × 2 + 47.1 = 61.23 square centimeter
The volume is
7.065 × 5 = 35.325 cm3
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