What will come in place of question mark (?) in the following questions
`sqrt(256) xx sqrt(169) + 3600 div 12 = 800 - ?`

Options

A. 312
B. 280
C. 292
D. 324

Answer

To solve the equation given in the question, we will break it down step by step.

**Step 1: Calculate the square roots.**
- We need to find the square root of 256 and 169.
- \( \sqrt{256} = 16 \)
- \( \sqrt{169} = 13 \)

**Step 2: Multiply the square roots.**
- Now, we multiply the results from Step 1.
- \( 16 \times 13 = 208 \)

**Step 3: Calculate the division.**
- Next, we need to calculate \( 3600 \div 12 \).
- \( 3600 \div 12 = 300 \)

**Step 4: Add the results from Step 2 and Step 3.**
- Now, we add the results from Step 2 and Step 3.
- \( 208 + 300 = 508 \)

**Step 5: Set up the equation.**
- According to the question, we have:
- \( 508 = 800 - ? \)

**Step 6: Solve for the question mark.**
- Rearranging the equation gives us:
- \( ? = 800 - 508 \)
- \( ? = 292 \)

Thus, the value that comes in place of the question mark (?) is **292**.