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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Geometry
4.17 Diameter of a Circle - II

Example:
The area of a circle is 9.625 sq cm. Find its diameter.

Solution:
Given that,
The area of a circle (A) = 9.625 sq cm.
If the radius of the circle is r cm.
A = pr2.
9.625 = 22/7 * r2
r2 = (9.625 * 7) / 22
r2 = 3.0625
Take square roots on both sides.
r = 1.75
Therefore, the radius of the circle is 1.75 cm.
So, the diameter = 2r = 2 * 1.75 = 3.5 cm.


Directions: Read the above example carefully and answer the following questions. Also write at least 10 examples of your own.

Q 1: Find the area of a circle its diameter is given by 35 cm.
962.1 sq cm
945.5 sq cm
915.5 sq cm
925.5 sq cm

Q 2: The area of a circle is 6.16 sq cm. Find its radius.
1.4 cm
28 cm
14 cm
2.8 cm

Q 3: The area of a circle is (924/6) sq cm. Find its diameter.
28 cm
7 cm
24 cm
14 cm

Q 4: The area of a circle is 361 sq cm. Find its diameter.
3.25 cm
4.92 cm
6.23 cm
5.55 cm

Q 5: Find the area of the circle if its radius is given by 0.35 cm.
1.54 sq cm
1.4 sq cm
0.385 sq cm
1 sq cm

Q 6: The area of a circle is 498.96 sq cm. Find its radius.
16.51 cm
25.21 cm
32.5 1cm
12.61 cm

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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