Answer:
1)
S=48984 m^2
2)
slant height=19 m.
Explanation:
1)
The height(h) of cone is given by: 50 m.
Diameter of cone is: 240 m.
Also radius(r) of cone is:240/2=120 m.
The lateral surface(S) area is given by:


Hence, lateral surface area of cone= 48984 m^2.
2)
We are given that radius(r) of cone=9 m.
Height (h) of cone = 17 m.
Slant height(l) of cone is given by:


Hence, slant height is 19 m.