Fill the cylindrical bucket with water of 20cm in diameter and HCM in height, and pour it into a cuboid water tank. The water accounts for 2 / 3 of the tank The length is 20 cm. The width is 10 cm. If the height is 6cm, how much is h? Take 3.14 as π, and keep one decimal place. It is very urgent,

Fill the cylindrical bucket with water of 20cm in diameter and HCM in height, and pour it into a cuboid water tank. The water accounts for 2 / 3 of the tank The length is 20 cm. The width is 10 cm. If the height is 6cm, how much is h? Take 3.14 as π, and keep one decimal place. It is very urgent,

^2 is the square
3.14×（20÷2）^2×h＝20×10×6×2/3
314h＝800
h＝800÷314
h≈2.5

Fill a cylindrical bucket with an inner diameter of 20cm and a height of 36cm with water, and pour it into a rectangular water tank. Water accounts for 2 / 3 of the volume of the tank. If the length and width of the water tank are 12cm and 9cm respectively, the height of the water tank is about?

Cylinder volume: π * r & sup2; * h, inner diameter is diameter
3.14×(20÷2)²×36=11304 cm³
11304÷ 2/3=16956cm³
The water tank height is 16956 ± (12 × 9) = 157 cm

Fill the cylindrical bucket with water with an inner diameter of 14 cm and a height of 30 cm, and then pour the water into a cuboid tank. If the water only accounts for two-thirds of the area of the tank, the area of the tank is () cubic cm

Water only accounts for two-thirds of the volume of the water tank, then the volume of the water tank is () cubic centimeter
Volume of cylinder v = 3.14 * 7 * 7 = 147.58 (CC)
147.58 cubic centimeter accounts for two-thirds of the volume of the water tank, so the volume of the water tank is
147.58 / (2 / 3) = 221.37 (cm3)