A bathtub holds 80 gallons of water. Water drains out of the tub at a rate of 2 gallons every thirty seconds. At this rate, how many minutes will it take a full bathtub to drain completely?

Given :

A bathtub holds 80 gallons of water.

Water drains out of the tub at a rate of 2 gallons every thirty seconds.

To Find :

How many minutes will it take a full bathtub to drain completely.

Solution :

We know, 30 seconds = 0.5 minute.

Rate of water flow per minute is given by :

Let, bathtub will completely drain in x minutes.

So, 4x = 80

x = 80/4

x = 20 minutes

Hence, this is the required solution.

w'x is 0.

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