Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Mensuration Solid Figures
A hollow cylindrical iron pipe has internal and external radii of 14 m and 21 m, respectively, and its height of 14 m. If this pipe is to be painted all over, find the area to be painted.
(Use π = \(\frac{22}{7}\))
1
4000 m2
2
3562 m2
3
4620 m2
4
More than one of the above
5
None of the above