Area of Surfaces MCQ with Answers

Area of Surfaces MCQ with Answers

16) What is the diameter of the circle, if the area of the circle is 78.5cm²?

Answer is:

10 cm

17) What is the area of the circle if the radius is 10 cm?

Answer is:

314 cm²

18) What is the radius of the semicircle, if the circumference of the semicircle is 28.26 cm?

Answer is:

5.49 cm

19) What is the diameter of the semicircle, if the circumference of the semicircle is 21.98 cm?

Answer is:

8.55 cm

Explanation:

The perimeter of Semicircle = (πr + 2r)
21.98 = (πr + 2r)
21.98 = r(π + 2)
21.98 = r(5.14)
r=4.276
d= 8.552 cm

What is the diameter of the semicircle, if the circumference of the semicircle is 21.98 cm?

20) What is the area of the semicircle, if the diameter is 14 cm?

Answer is:

76.93 cm²