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).