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A table top is a semi circle in shape. The diameter is 120cms. A metal edge has to be fitted around its edge. What is the length of the metal edge?

User Sioux
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Answer: 60π cm

Explanation:

To find the length of the metal edge needed to fit around the semi-circle table top, we need to calculate the circumference of the semi-circle.

The diameter of the table top is given as 120 cm, which means the radius (half of the diameter) is 120/2 = 60 cm.

The circumference of a full circle is given by the formula C = 2πr, where r is the radius. However, since we only have a semi-circle, we need to divide the circumference by 2.

Therefore, the circumference of the semi-circle is (2πr)/2 = πr.

Substituting the value of the radius (60 cm) into the formula, we get:

C = π * 60 = 60π cm.

Hence, the length of the metal edge needed to fit around the semi-circle table top is 60π cm, or approximately 188.5 cm (if rounded to one decimal place).

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