InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Find the volime, curved surface area and the total surface area of a hemisphere of diameter 7 cm |
|
Answer» Radius of the hemisphere, r = 3.5 cm Volume of the hemisphere `= ((2)/(3) pi r^(3)) cm^(3)` `= ((2)/(3) xx (22)/(7) xx (7)/(2) xx (7)/(2) xx (7)/(2)) cm^(3)` `= (539)/(6)cm^(3) = 89.83 cm^(3)` Curved surface area of the hemisphere `= (2pi r^(2)) cm^(2)` `= (2 xx (22)/(7) xx (7)/(2) xx (7)/(2)) cm^(2) = 77 cm^(2)` Total surface area of the hemisphere `= (3pir^(2)) cm^(2)` `= (3 xx (22)/(7) xx (7)/(2) xx (7)/(2)) cm^(2) = (231)/(2) cm^(2) = 115.5 cm^(2)` |
|