A pond in a field holds 1,20,000 litres of water. It costs 18,000 to make such a pond. How many ponds will be required to store 4,80,000 litres of water, and what would be the expense incurred ?

Explanation

To solve the problem step by step, we will determine how many ponds are needed to store 4,80,000 litres of water and calculate the total expense incurred.

### Step 1: Determine the capacity of one pond
We know that one pond holds 1,20,000 litres of water.

### Step 2: Calculate the number of ponds required
To find out how many ponds are needed to store 4,80,000 litres of water, we can set up a proportion.

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