What will come in place of question mark (?) in the following questions
`2160 div 12 + 5740 div 14 - 3150 div 15 + ? = 400`

Options

A. 16
B. 32
C. 28
D. 20

Answer

To solve the equation \( 2160 \div 12 + 5740 \div 14 - 3150 \div 15 + ? = 400 \), we will follow these steps:

### Step 1: Perform the divisions
1. Calculate \( 2160 \div 12 \):
\[ 2160 \div 12 = 180 \]

2. Calculate \( 5740 \div 14 \):
\[ 5740 \div 14 = 410 \]

3. Calculate \( 3150 \div 15 \):
\[ 3150 \div 15 = 210 \]

### Step 2: Substitute the results back into the equation
Now substitute the results of the divisions into the equation:
\[ 180 + 410 - 210 + ? = 400 \]

### Step 3: Simplify the left side
1. First, add \( 180 + 410 \):
\[ 180 + 410 = 590 \]

2. Now subtract \( 210 \) from \( 590 \):
\[ 590 - 210 = 380 \]

### Step 4: Set up the equation to find ?
Now we have:
\[ 380 + ? = 400 \]

### Step 5: Solve for ?
To find \( ? \), subtract \( 380 \) from \( 400 \):
\[ ? = 400 - 380 = 20 \]

### Conclusion
Thus, the value that comes in place of the question mark (?) is \( 20 \).