Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour

7.A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?


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=\(440m^2\)

NCERT solutions of related questions for Mensuration

NCERT solutions of related chapters class 8 maths

NCERT solutions of related chapters class 8 science