Results are out! Find what you Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Gcse question help please

Announcements Posted on
Let our uni choice search tool match you with your perfect university 19-11-2015
  1. Offline

    The question is that:

    Radius of sphere is 3cm
    radius of cone is 3cm

    TOTAL surface area of cone is equal to the surface area of the sphere workout the length of the slanted height.

    The book answer is 12, but i get 12 and 9

    my answer for 12 is (but this does not include the radius)


    for 9 i use the total surface are of the cone meaning that i also incluse the circle at the bottom as it say total s.a.

    But when i use the total i get 9 when i use the curved suface i get 12 is this an error in the book or am i just missin something.

  2. Offline

    Did they say anywhere that it was an open cone? If it was a closed cone you would include the circle at the base


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: February 29, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Today on TSR

Find your perfect uni

Let us match you to your ideal course

What class are you?
Study resources
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.