Question

Tank is 3 by 5 full of water if 250 litres more are required to fill it up to the brim what is the total capacity of the tank

Answer 1

Since the tank is already 3/5 filled with water, only 2/5 of the total capacity is needed to be filled

We know that to fill it we need 250 litres

Hence, 2/5th of the total capacity is 250 litres

If the total capacity of the tank is x

$\frac{2}{5} *x=250\\x=250*\frac{5}{2}=625 litres$

Therefore the tank has a total capacity of 625 litres

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