(E) None of these
15. The area of the base of a right cone is
1386 cm² and its curved surface area is
2310 cm?. Find the height of the cone.
Answers
Answered by
1
Answer:
Step-by-step explanation:
The base is comprised of a circle
Surface area of circle is 4*22/7*r*r
4*22/7*r*r=1386
transpose 22 to 1386
1386/22 = 63
4*r*r = 63*7 =441
r*r =110.25
r=10.5
now we have radius
CSA of cone is 22/7*r*l
22/7*10.5*l =2310
2310/22 *7 =735
10.5*l=735 =
l=735/10.5 =70
l=70
h= root length*length - radius*radius
height = 69.2 (approx)
Similar questions