Answers

2015-09-12T17:48:44+05:30
Given: Hemisphere Radius (r)= 3.5cm. Required to find =Total surface area and volume of the given hemisphere =? Total surface area = 3πr² = 3* 22/7* 3.5* 3.5 cm² =66/7* 3.5 *3.5 cm² =808.5/7 cm² =115 cm² Volume = 2/3πr³ =2/3* 22/7 * 3.5* 3.5* 3.5cm³ = 2/3* 22* 0.5* 3.5* 3.5* 3.6cm³ =44/3* 0.5* 3.5* 3.5cm³ =269.5/3 cm³ (44* 0.5* 3.5* 3.5 = 269.5) =89.8 cm³
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I tried to write in good format but it messed up.
2015-09-13T10:38:42+05:30
The volume of a hemisphere is written as \frac{2}3 \pi r  ^3.
The area of a hemisphere is written as 2 \pi r ^2.

HemiVolume = \frac{2}3 \pi (3.5) ^3
HemiVolume = \frac{2}3 (134.695)
HemiVolume = 89.797

HemiArea = 2 \pi r ^2
HemiArea = 2 (38.484)
HemiArea = 79.969

Ans: Volume ≈ 89.797    SurfaceArea ≈ 79.969


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