Question

X 4.1.C-7

A cylindrical oil tank 8 A deep holds 780 gallons when filled to capacity. How many gallons remain in the tank when the depth of oil is 4 1/2 ft.​

Answer 1

439 gallons

Explanation:

When the tank is 8 ft, it holds 780 gallons

When the depth is reduced to 4.5 ft, it means 8 ft-4.5 ft=3.5 ft have been sold

Now, if 8 ft represent 780 gallons

3.5 ft represent x gallons used

`x=\frac {780 gallons*3.5 ft}{8 ft}`

x=341.25 gallons used

x is approximately 341 gallons used

To get the gallons remaining in the tank, we subtract gallons used which are 341 from full capacity which has 780 gallons

Gallons remaining at 4.5ft=780-341=439 gallons