 Messages
 35
 Reaction score
 18
 Points
 18
how to do the highlighted question?
Attachments

185.3 KB Views: 25
Anybody had unexpected results in 2016 Math D?
Also, anybody has access to May/June 2016 Math D question paper?
Thanks.
how to do the highlighted question?
Voulme of cylinder = pi r^2 h
thanksVoulme of cylinder = pi r^2 h
Volume of outter cylinder(VO) = pi (3.5 + r)^2 (20)
volume of inner cylider (VI)= pi r^2 (20)
Volume of solid = VO  VI
3000 = VO  VI
Solve for r
r = 5.07
Post the question. We will see where we can help u.can anybody please explain questions related to upperbond and lowerbond
No pblmthank you so much
You cant use cos rule here. How to solve without that.
But y can't v use it? It's not written in the question that v can not use itYou cant use cos rule here. How to solve without that.
I mean yes we can use it here. I'm looking for a way to solve without it.But y can't v use it? It's not written in the question that v can not use it
No there isn't... in the mark scheme as well the same one is givenI mean yes we can use it here. I'm looking for a way to solve without it.
Now I don't think there is.
Thank you by the way
We always use this in finding the area of a graph. (UPPERBOUND  LOWERBOUND)can anybody please explain questions related to upperbond and lowerbond