Find the surface area of sphere of radius 8 cm.
Answers
Radius of sphere = 8 cm
Now , we have to find out surface area of sphere.
We know that , surface area of sphere ( A)= 4π r²
surface area of sphere ( A) = 803.84 m²
Additional Information :
Volume of cylinder = πr²h
T.S.A of cylinder = 2πrh + 2πr²
Volume of cone = ⅓ πr²h
C.S.A of cone = πrl
T.S.A of cone = πrl + πr²
Volume of cuboid = l × b × h
C.S.A of cuboid = 2(l + b)h
T.S.A of cuboid = 2(lb + bh + lh)
C.S.A of cube = 4a²
T.S.A of cube = 6a²
Volume of cube = a³
Volume of sphere = (4/3)πr³
Surface area of sphere = 4πr²
Volume of hemisphere = ⅔ πr³
C.S.A of hemisphere = 2πr²
T.S.A of hemisphere = 3πr²
➥ This question says that we have to find the surface area of sphere whose radius is 8 cm.
➥ Radius of sphere = 8 cm
➥ Surface area of sphere.
➥ Surface area of sphere = 803.84 m²
➥ Surface area of sphere formula
➥ Surface area of sphere = 4πr²
➥ π is pronounced as pi
➥ Value of π is or 3.14
➥ r denotes Radius
➥ ² means square
~ Finding Surface Area of sphere
Surface Area = 4πr²
Surface Area = 4 ×
× 8²
Surface Area = 4 ×
× 64
Surface Area =
× 64
Surface Area =
Surface Area = 803.84 m²
Sphere diagram -
Some formulas related to circle -