Saved Bookmarks
| 1. |
Curved surface area of hemisphere of radius “r” is equal to __________(a) 2πr^2(b) 4πr^2(c) 3πr^2(d) πr^2I got this question during a job interview.I'm obligated to ask this question of Surface Area of a Sphere in chapter Surface Areas and Volumes of Mathematics – Class 9 |
|
Answer» RIGHT choice is (a) 2πr^2 To elaborate: Hemisphere is created when a SPHERE is DIVIDED in two equal parts. Hence, the curved surface are of a hemisphere = \(\FRAC{Surface \,AREA \,of \,a \,sphere}{2}\) = \(\frac{4πr^2}{2}\) = 2πr^2. |
|