A) \[3267\,c{{m}^{2}}\]
B) \[3384\,c{{m}^{2}}\]
C) \[3224\,c{{m}^{2}}\]
D) \[3168\,c{{m}^{2}}\]
E) None of these
Correct Answer: D
Solution :
Explanation Option [d] is correct. Length of the pipe, \[h=20\text{ }cm.\] External radius of the pipe, \[R=\frac{25}{2}=12.5\text{ }cm.\] Thickness of pipe \[=1\text{ }cm.\] Internal radius of this pipe, \[r=\left( 12.5-1 \right)=11.5\text{ }cm.\] Total surface area of the pipe = \[2\pi Rh+2\pi rh+2\left( \pi {{R}^{2}}-\pi {{r}^{2}} \right)=3168\,\,c{{m}^{2}}.\]
You need to login to perform this action.
You will be redirected in
3 sec
