A shopkeeper has 165 L of oil in a drum. He sold 18 L 500 mL, 23 L 520 mL, 13 L 750 mL and 29 L oil to customers. How much oil is left in the drum ?

Options

A. 77 L 50 mL
B. 80 L 230 mL
C. 68 L 500 mL
D. 97 L 520 mL

Answer

To find out how much oil is left in the drum after the shopkeeper has sold some, we need to follow these steps:

### Step 1: Convert all quantities to the same unit
The quantities of oil sold are given in liters and milliliters. We will convert everything to liters for easier calculation.

1. **Convert 18 L 500 mL to liters:**
- 500 mL = 0.5 L
- So, 18 L 500 mL = 18 L + 0.5 L = 18.5 L

2. **Convert 23 L 520 mL to liters:**
- 520 mL = 0.520 L
- So, 23 L 520 mL = 23 L + 0.520 L = 23.520 L

3. **Convert 13 L 750 mL to liters:**
- 750 mL = 0.750 L
- So, 13 L 750 mL = 13 L + 0.750 L = 13.750 L

4. **Convert 29 L to liters:**
- 29 L is already in liters.

### Step 2: Calculate the total oil sold
Now, we will add all the quantities of oil sold together:

- Total oil sold = 18.5 L + 23.520 L + 13.750 L + 29 L

Calculating this step-by-step:
- 18.5 + 23.520 = 42.020 L
- 42.020 + 13.750 = 55.770 L
- 55.770 + 29 = 84.770 L

So, the total oil sold is **84.770 L**.

### Step 3: Calculate the remaining oil in the drum
Now, we will subtract the total oil sold from the initial amount of oil in the drum:

- Initial amount of oil = 165 L
- Remaining oil = Initial amount - Total oil sold
- Remaining oil = 165 L - 84.770 L

Calculating this:
- 165 - 84.770 = 80.230 L

### Final Answer
The amount of oil left in the drum is **80.230 L**.

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