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High School Mathematics
4.28 Total Surface Area of Hemisphere

Example:
The radius of the hemisphere is 7 cm. find its total surface area.
Solution:
Total surface area of hemisphere = 3 * pi * r2
Given that,
r = 7 cm.
= 3 * 22/7 * 7 * 7
= 462 Sq. cm.
Directions: Solve the following problems. Also write at least 5 examples of your own.
Q 1: The radius of the hemisphere is 4.2 cm. find its total surface area.
166.34 Sq. cm.
166.32 Sq. cm.
166.30 Sq. cm.
166.36 Sq. cm.

 Q 2: The radius of the hemisphere is 10.5 cm. find its total surface area.
1039.3 Sq. cm.
1039.7 Sq. cm.
1039.5 Sq. cm.
1039.9 Sq. cm.

Q 3: The radius of the hemisphere is 19.6 cm. find its total surface area.
3622.06 Sq. cm.
3622.08 Sq. cm.
3622.04 Sq. cm.
3622.02 Sq. cm.

 Q 4: The radius of the hemisphere is 17.5 cm. find its total surface area.
2887.5 Sq. cm.
2887.7 Sq. cm.
2887.3 Sq. cm.
2887.1 Sq. cm.

Q 5: The radius of the hemisphere is 5.25 cm. find its total surface area.
239.875 Sq. cm.
239.758 Sq. cm.
239.857 Sq. cm.
239.785 Sq. cm.

 Q 6: The radius of the hemisphere is 3.5 cm. find its total surface area.
115.5 Sq. cm.
115.25 Sq. cm.
115.05 Sq. cm.
115.75 Sq. cm.

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 Question 8: This question is available to subscribers only!


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