Deepak had 17.45 litres of water. He gave 8.30 litres to his neighbour. The quantity of water left with him is _________ .

Options

A. `9.30` litres
B. `5.45` litres
C. `9.15` litres
D. `5.82` litres

Answer

To find the quantity of water left with Deepak after giving some to his neighbor, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Initial Quantity of Water:**
- Deepak initially had **17.45 litres** of water.

2. **Identify the Quantity of Water Given Away:**
- He gave away **8.30 litres** of water to his neighbor.

3. **Set Up the Subtraction:**
- To find the quantity of water left, we need to subtract the amount given away from the initial quantity.
- This can be expressed as:
\[ \text{Water left} = \text{Initial quantity} - \text{Water given} \]
- Therefore:
\[ \text{Water left} = 17.45 - 8.30 \]

4. **Perform the Subtraction:**
- Align the numbers by their decimal points:
```
17.45
- 8.30
---------
```
- Start subtracting from the right:
- **Hundredths place:** 5 - 0 = 5
- **Tenths place:** 4 - 3 = 1
- **Units place:** 7 - 8 (we need to borrow 1 from the 1 in the tens place, making it 6):
- 17 becomes 16 (after borrowing), so 17 becomes 16, and we have 17 - 8 = 9.
- **Tens place:** 1 (after borrowing) - 0 = 1.

- Therefore, the result of the subtraction is:
\[ 9.15 \]

5. **Write the Final Answer:**
- The quantity of water left with Deepak is **9.15 litres**.

### Final Answer:
The quantity of water left with Deepak is **9.15 litres**.