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A container contains 30 liters of alcohol. 3 liters of alcohol is taken out and replaced by an equal amount of water. The same process is repeated 2 times more. How much alcohol is left in the container now?

A container contains 30 liters of alcohol. 3 liters of alcohol is taken out and replaced by an equal amount of water. The same process is repeated 2 times more. How much alcohol is left in the container now? Correct Answer 21.87 liters

Given:

Quantity of alcohol = 30 liters

Formula used:

Quantity of A left = Quantity of A originally present × n

Where A, R, Q, and n is the name of the product, the quantity taken out, the original quantity of the product and process repeated respectively:

Calculation:

Quantity of alcohol left = 30 × 3

= 30 × (9 / 10)3

= (3 × 729) / 100

= 21.87 liters

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