If diameter of the base of a cone is 12 cm and its height is 8 cm, then find
the total surface area and volume of the cone
Answers
Answer:
Explanation:
r=12/2=6cm , h=8cm , l=√h² + r²=√64+ 36=√100=10cm
∴TSA of cone = πr(r+l)
= 22/7*6(6+10)
= 132/7*16
=301.71 cm²
∴Volume of cone = 1/3πr²h
= 1/3*22/7*36*12
= 452.57 cm³
hope this helps :) pardon me if my calculations are wrong I too am a learner
Explanation:
radius = 12/2
radius=6
volume of cone = 1/3πr^2h
volume of cone = 1/3*3.14*6*6*8
volume of cone=3.14*2*6*8
volume of cone=3.14*96
volume of cone= 301.44cm^3
radius= 6
height=8
slant height=?
(l)^2=(r)^2 +(h)^2
(l)^2=(6)^2+(8)^2
(l)^2=36+64
(l)^2=100
l=10
total surface area=πr(r+l)
total surface area = 3.14*8(8+10 )
total surface area=3.14*8*18
total surface area = 452.16cm^2