Question

this is the question​

Answer 1

Answer:

Given,

Vol. of cone=12936cm^3

d=42cm

r=42/2=21cm

Vol. of cone=1/3πr^2h

12936=1/3×22/7×21×21×h

h=28cm

l^2=h^2+r^2

l^2=28^2+21^2

l^2=784+441

l^2=1225

l=35cm

CSA of cone=πrl

=22/7×21×35

=2310cm^2

Answer 2

Answer:

refer attchment...........