Question Details

31 2 - 169 = 62 % of ? + 24 2

What should come in place of question mark (?) in the following questions?

Options

A

400

B

500

C

600

D

300

Show Answer

Correct Answer :

Option C

600

Solution :

To find the value that comes in place of the question mark (?), let us set up the equation from the given problem:

312-169=62% of x+242

Where x represents the unknown value (?).

Step 1: Simplify the terms on both sides of the equation.

Calculate the squares and the square root:
312=961
169=13
242=576

Substitute these calculated values back into the equation:

961-13=62% of x+576

Step 2: Simplify the left side.

948=62% of x+576

Step 3: Isolate the percentage term by subtracting 576 from both sides.

948-576=62% of x

372=62% of x

Step 4: Solve for x.

Express 62% as a fraction:
372=62100×x

Multiply both sides by 100 and divide by 62:

x=372×10062

Since 372÷62=6:

x=6×100=600

Therefore, the value that should come in place of the question mark is 600.

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