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leannhb3162
22.04.2020 •
Mathematics
A water tank is in the shape of a cylinder with a diameter of 20 feet and a height of 20 feet. The tank is 70% full. About how many gallons of water are in the tank? Round your answer to the nearest whole number.
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Ответ:
32901 gallons
Step-by-step explanation:
First, we find the volume of the cylindrical water tank when it is full.
The volume of a cylinder is given as:
V =![\pi r^2h](/tpl/images/0619/6930/b8c9e.png)
where r = radius and h = height of the cylinder
The diameter of the tank is 20 feet, hence, its radius is 10 feet.
Volume, V, is therefore:
V =![\pi * 10^2*20 = 6283.19 ft^3](/tpl/images/0619/6930/e2170.png)
This is the volume of the tank, when it is full.
When it is 70% full, the volume will be:
1 cubic foot (
) is 7.48 gallons.
Therefore, the volume of the 70% full tank in gallons will be:
4398.23 * 7.48 = 32901.05 gallons ≅ 32901 gallons
The tank contains 32901 gallons of water.
Ответ:
add real numbers together and imaginary numbers together
A + B = 12 + 11i
Step-by-step explanation: