KK1387 said: Surface Area of a cylinder = 2πrsquared + 2πrh
Therefore:
if radius = 1:
2π + 2πh
6.28 + 15.072
21.352m squared
In this case, pi = 3.14. change it if need be.

KK1387 said: Surface Area of a cylinder = 2πr(r+h)
Therefore:
2π(1+2.4)
2π(3.4)
6.28 x 3.4
21.532m squared
I have rounded pi to two decimal places, substitute it with more if need be.

KK1387 said: You've done that correctly.
9.11m squared.
Also, sorry for my mistake first time round, thought you wrote that the radius was 1m.

KK1387 said: The book is a screw-up; if the top circle of a cylinder is 0.785m, then the Base must be too. Unless there's a different definition for base somewhere in the book...

hamzie said:

KK1387 said: The book is a screw-up; if the top circle of a cylinder is 0.785m, then the Base must be too. Unless there's a different definition for base somewhere in the book...

thats what he hass though

KK1387 said: The book is a screw-up; if the top circle of a cylinder is 0.785m, then the Base must be too. Unless there's a different definition for base somewhere in the book...
Your answer is correct, though, I'm sure.
6.28 was in my answer because I messed up thinking the radius was 1, not .5.

Mintyjam said:

DjChopper said: Lol I find it fairly straightforward... what I hate and suck with is space. As in, spheres and other 3d objects and stuff >_>

But you like balls, right?

DjChopper said: Ohh I do like my balls...

KK1387 said: Pretty sure the book is wrong.
Formula for the rectangluar side of a cylinder:
2πrh
--- 2π x 0.5 x 2.4
.-. 3.142 x 2.4
= 7.5408
I swear the book is against you!!!