i have a cylinder here i need to find the volume and the surface area
the cylinder is 4cm base height 15cm
would the volume be 3.14 x 42 x 15 = 753.6 i have to give the answer to 3 significant figures so 754cm.
and would the surface area be
2 x 3.14 x 4 x 15 + 2 x 3.14 x 42 = 194.68 i have to give the answer to 2 siginificant figures so 190cm!
is that right?????
Hmmm, I am pretty sure the formulas are as following:
Therefore, the correct volume is 188.496 or 188 (3 sig figures) and the correct surface area is 213.628 or 214 (3 sig figures)
I think both of your are taking the radius as 4 cm whereas that's the length of the base, which can be used as a diamter but half that is the radius of that cylinder.
Hope this helps!