# Anita has a vessel that is full of refined oil. She wants to measure the capacity of the vessel. For this, she takes out 25% of the refined oil from the vessel and then fills the vessel with mustard oil. She repeats the process 4 times and knows that the vessel then contains exactly 10 litres of refined oil. What is the capacity of the vessel?   Option 1)   33 litres   Option 2)   40 litres   Option 3)   2560/81 litres   Option 4)   None of these   Option 5)   2460/81 litres

The capacity of the vessel is:

$Y= X/4, n=4$

$X(1-\frac{y}{x})^{n} = 10 ; x(1- 1/4)^{4} =10$

$X (\frac{3}{4})^{4}=10$

$X = 256/81 x 10 = 2560/81 L$

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