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1 . When bent in the form of a circle a wire has a radiud of 28 cm. If it is bent int he form of a square. what will be its area in cm?

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Answer: Option C

Explanation:

When a wire is bent in the form of a circle with a radius of 28 cm, its circumference is given by the formula:

Circumference of circle = 2 * π * radius

Circumference = 2 * π * 28 cm = 56π cm

Now, if the same wire is bent in the form of a square, the perimeter of the square will be equal to the circumference of the circle, which is 56π cm.

The perimeter of a square is given by:

Perimeter of square = 4 * side

So, in this case:

4 * side = 56π

Divide both sides by 4:

side = (56π) / 4 = 14π cm

Now, to find the area of the square, we square the length of one side:

Area of square = side^2 = (14π)^2 = 196π^2 cm²

To get the numerical value, we can approximate π as approximately 3.14:

Area ≈ 196 * (3.14)^2 ≈ 1936 cm²

So, the area of the square formed by the wire when bent is approximately 1936 cm².

সমন্বিত ৭ ব্যাংক ও ১টি আর্থিক | সিনিয়র_অফিসার | 27-11-2021