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The question i want to know is linked below, please help!!

The question i want to know is linked below, please help!!-example-1

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Answer: 250 metre

Explanation:

The radius of the semi circle will be:

Radius r = diameter/ 2

Where diameter = 140

r = 140/2 = 70m

The radius is also equal to the width of the diameter.

Find the quarter of the circumference of a circle.

Circumference of a circle = 2πr

Substitute for r in the formula

Circumference = 2 × 22/7 × 70

Circumference = 44 × 10 = 440 m

Divide the circumference by 4

440/4 = 110 m

The perimeter P of the shaded region will be

P = 110 + 70 + 70

Perimeter = 250 m

Therefore, the perimeter of the shaded region is 250 m

User Cato Yeung
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