A water tank holds 800 gallons but is leaking at a rate of 5 gallons per week. A second water tank holds 1,000 gallons but is leaking at a rate of 9 gallons per week. After how many weeks will the amount of water in the two tanks be the same? The amount of water in the two tanks will be the same in
weeks.

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the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!