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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
4.13 Surface Area of a Sphere - I

Example:
Find the surface area of the sphere of radius 7 cm.
Solution:
Surface area of the sphere = 4 * pi * r2
Given that,
r = 7 cm.
Area = 4 * 22/2 * 7 * 7
= 616 Sq. cm.


Directions: Solve the following problems. Also write at least 5 examples of your own.
Q 1: Find the surface area of the sphere of radius 5.25 cm.
346.5 Sq. cm.
345.5 Sq. cm.
346 Sq. cm.
345 Sq. cm.

Q 2: Find the surface area of the sphere of radius 25.2 cm.
7983.83 Sq. cm.
7983.38 Sq. cm.
7983.63 Sq. cm.
7983.36 Sq. cm.

Q 3: Find the surface area of the sphere of radius 44.1 cm.
24494.04 Sq. cm.
24449.4 Sq. cm.
24494.4 Sq. cm.
24449.04 Sq. cm.

Q 4: Find the surface area of the sphere of radius 4.2 cm.
221.74 Sq. cm.
221.76 Sq. cm.
221.72 Sq. cm.
None of these

Q 5: Find the surface area of the sphere of radius 10.5 cm.
1382 Sq. cm.
1384 Sq. cm.
1380 Sq. cm.
1386 Sq. cm.

Q 6: Find the surface area of the sphere of radius 19.6 cm.
None of these
4839.44 Sq. cm.
4829.44 Sq. cm.
4819.44 Sq. cm.

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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