Question

total surface area of cone is 616sq.cm if the slant height of the cone is three timees the radius of its base, find its slant height?

Answer 1

TSA of cone = 616
πr (l+r) = 616
πr (3r+r) = 616
r×4r = 616×7/22
4r^2 = 196
r^2 = 196/4
r = √49 = 7cm
Slant height = 3r = 3×7 = 21cm

Answer 2

Answer:

Step-by-step explanation:

So . ....

TSA of cone = 616

πr (l+r) = 616

πr (3r+r) = 616

r×4r = 616×7/22

4r^2 = 196

r^2 = 196/4

r = √49 = 7cm

Slant height = 3r = 3×7 = 21cm

I think its is good

:)