Mrs. Bose bought 15.5 litres of refined oil for RS 1122.20. Find its cost per litre.

Options

A. `76.4`
B. `74.4`
C. `72.4`
D. `70.4`

Answer

To find the cost per litre of refined oil that Mrs. Bose bought, we can follow these steps:

### Step 1: Identify the total cost and total quantity
- Total cost of refined oil = Rs 1122.20
- Total quantity of refined oil = 15.5 litres

### Step 2: Set up the equation for cost per litre
To find the cost per litre, we need to divide the total cost by the total quantity:
\[ \text{Cost per litre} = \frac{\text{Total Cost}}{\text{Total Quantity}} = \frac{1122.20}{15.5} \]

### Step 3: Perform the division
Now, we will divide Rs 1122.20 by 15.5. To make the division easier, we can eliminate the decimal by multiplying both the numerator and the denominator by 10:
\[ \frac{1122.20 \times 10}{15.5 \times 10} = \frac{11222}{155} \]

Now, we perform the division:
\[ 11222 \div 155 \]

Calculating this gives:
\[ 11222 \div 155 = 72.4 \]

### Step 4: Conclusion
Thus, the cost per litre of refined oil is Rs 72.4.

### Final Answer:
**The cost per litre of refined oil is Rs 72.4.**

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