Question

For a right circular cone, if the radius is reduced to 1/5 its original size and the slant height is reduced to 1/6 its original size, find the surface area if the original radius is 8 centimeters and the original slant height is 13 centimeters. *** edited by a moderator to supply missing information ***

Answer 1

do you can reposting these jpg files using the Attach File button bottom to this window

hope will be more understandably

Answer 2

I have added the original numbers back in if you would like to help

Answer 3

Here is a cool source you can use and play with the graphics they provide.
https://www.mathopenref.com/conearea.html

The Area of a Right Cone
= \(\large ( \pi *r*s ) + ( \pi *r^2) \)
where r = radius and s = slant height


Now, we are told that the original radius is 8 cm and original slant height is 13 cm.

We are also told that:
the new radius is 1/5 the original
which makes the new radius = 8/5 cm
and
the new slant height is 1/6 the original
which makes the new slant height = 13/6 cm

Using these two new values, we can plug them into the provided equation (above) and find the answer to this problem. :)