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## Explanation

If One-third of a tank holds 80 litres of water.

Then, half of the tank can hold 120 litres of water which can be figure out as follows.

Let suppose the total capacity of a tank is “y” and given equation shows y/3 = 80 litres of water.

Here we can easily find out the value of y (y = 80 x 3 = 240 litres).

And half of tank can hold; 240/2 = 120 litres of water.

## To Find

Quantity of water that half of the tank hold = ?

## Solution

We are given two quantities here i.e. tank capacity and quantity of water.

**Tank Capacity Quantity of Water**

1/3 80 litres

1/2 y (say)

1/3 is smaller than 1/2 which means capacity of tank is increasing and of course more water can be stored so there is a direct relation.

1/3 : 1/2 = 80 : y

2/3 = 80/y

2y = 80 x 3

y = 240/2

**y** = **120 litres answer**

## Conclusion

If one-third of a tank holds 80 litres of water, then the quantity of water that half of the tank hold would be 120 litres.