Question

This figure consists of a rectangle and semicircle.

What is the perimeter of this figure?

Use 3.14 for pi.

60.84 m

72.84 m

79.68 m

98.52 m

Answer 1

Perimeter includes three sides of rectangle:

15m + 12m + 15m

Plus half of circle with diameter 12m

Circumference = diameter * PI

Circumference = 37.68m.

1/2 circumference = 18.84m

Total perimeter is 15m+12m+15m+18.84m

60.84m

Answer 2

Answer: First option is correct.

Explanation:

Since we have given that

Length of rectangle = 12 m

Breadth of a rectangle = 15 m

Radius of semi-circle is given by

`(12)/(2)=6\ m`

So, Perimeter of this figure is given by

`12+15+15+\pi* r\\\\=42+3.14* 6\\\\=42+18.84\\\\=60.84\ m`

Hence, Perimeter of this figure is 60.84 m.

Therefore, First option is correct.