Volume of a right circular cone is 78848 cm. Its diameter is 56 cm . Find its slant height
Answers
Answered by
6
Given :
- Volume of a right circular cone is 78848 cm. Its diameter is 56 cm
To find :
- Find its slant height
Solution :
Volume of cone = ⅓πr²h
78848 = ⅓ x 22/7 x 28 x 28 x h
78848 = ⅓ x 22 x 4 x 28 x h
h = 96
slant height (l) = √r² + h²
= √28² + 96²
= 100 cm
Extra 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 = 4/3πr³
Surface area of sphere = 4πr²
Volume of Hemisphere = ⅔ πr³
C.S.A of hemisphere = 2πr²
T.S.A of hemisphere = 3πr²
Similar questions