0
The surface area of a sphere is 4 x pi x r x r so in our case (since we have only half a sphere (hemisphere) the surface ares would be (0.5) x 4 x pi x 9 x 9 =162 x pi square cm. But now you have to add the area of the base because it gets exposed when youcuta sphere (to get the hemisphere) and the area of the base would be pi x r x r = pi x 9 x 9 = 81 x pi square cm. So add the two results to get 243 x pi = 763.4 square cm
Still curious? Ask our experts.
Chat with our AI personalities
Jordan
Taiga
DevinAdd your answer:
Earn +20 pts
What is radius of hemisphere whose total surface area is 942 cm?
The surface area of a sphere can be found with the formula 4pi * r2. Assuming the hemisphere is exactly half of a sphere, the surface area of a hemisphere can be found using the formula A = 2pi * r2 + pi * r2 Which can be written as A = pi(3r2) 942cm/pi = 3r2 314cm/pi = r2 r = 10cm (approximately) The radius of the hemisphere is approximately 10cm.
What is the difference between curved surface area of hemisphere and total surface area of hemisphere?
Curved surface area of a hemisphere means only the bent part of it , i.e,the part which looks like half of a sphere. Total surface area of a hemisphere is the circular top of a hemisphere + curved surface area of a hemisphere. So the formula goes like this: Curved surface area of hemisphere= 2πr2 Total surface area of hemisphere= 2πr2 + πr2 = 3πr2
What is the surface area of a cone with a slant height of 22 cm and radius of 7 cm?
A cone with a slant height of 22cm and radius of 7cm has a total surface area of about 637.74cm2
Why does a powdered solid have a larger surface area than a solid lump?
Each speck of the powder has a smaller surface area than the lump of solid, however the total surface area of the powder specks will be greater than that of the solid lump
What is the surface area of a cylinder with a radius of 10Cm and a height of 10Cm?
Total SA = 1,256.6 cm2
