If 15 oranges रु 110,what do 39 0ranges cost ?

Answer

To solve the problem step by step, we will use the unitary method.

**Step 1: Determine the cost of 1 orange.**
We know that the cost of 15 oranges is Rs. 110. To find the cost of 1 orange, we divide the total cost by the number of oranges.

\[ \text{Cost of 1 orange} = \frac{110 \text{ Rs}}{15 \text{ oranges}} = \frac{110}{15} \text{ Rs} \]

**Step 2: Simplify the fraction.**
Now, we simplify \(\frac{110}{15}\).

\[ \frac{110}{15} = \frac{22}{3} \text{ Rs} \quad (\text{dividing both numerator and denominator by 5}) \]

**Step 3: Calculate the cost of 39 oranges.**
Now that we have the cost of 1 orange, we can find the cost of 39 oranges by multiplying the cost of 1 orange by 39.

\[ \text{Cost of 39 oranges} = \text{Cost of 1 orange} \times 39 = \frac{22}{3} \text{ Rs} \times 39 \]

**Step 4: Perform the multiplication.**
Now we will perform the multiplication:

\[ \text{Cost of 39 oranges} = \frac{22 \times 39}{3} \]

Calculating \(22 \times 39\):

\[ 22 \times 39 = 858 \]

So,

\[ \text{Cost of 39 oranges} = \frac{858}{3} \text{ Rs} \]

**Step 5: Simplify the final cost.**
Now we divide 858 by 3:

\[ \frac{858}{3} = 286 \text{ Rs} \]

Thus, the cost of 39 oranges is Rs. 286.

### Final Answer:
The cost of 39 oranges is Rs. 286.

---