Question

how i find this surface area,cause i dont understand how find heigh of sylinder?

Answer 1

Oh, is the cone on top included or just the cylinder of radius 7 cm and height 31 cm?

Answer 2

include...
31 cm is not heigh of sylinder

Answer 3

without knowing anything about the thing on top; your best solution will remain in a general form

Answer 4

Yes, thank you, amistre64. sh2 needs one more dimension to determine height of individual cylinder and cone.

Answer 5

i have this from mybook...no trouble with this, that 31 is totally heigh of sylinder and cone

Answer 6

With out knowing the something about the cone or some other dimension you can't tell the height of either and it matters if you want an number solution, with no variables.