Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour
Answer :
Given, r = 7 m and h = 3 m.
Sheet required to make a closed cylinder= Total surface area of the cylinder
\(= 2\pi r(r + h)\) sq. units
\(=2\times \frac { 22 }{ 7 } \times 7\times (3+7)\)
\(=2\times \frac { 22 }{ 7 } \times 7\times 10 \)
\(=440 m^2\)
So, the required metal sheet=\(440m^2\)