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Q7) 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:

Solution 7:

Amount of sheet required to make tank=total surface area of cylinder

r=7m h=3m

=2\pi r\left(r+h\right)

==2\times\frac{22}{7}\times7\left(7+3\right)

=44\times10

=440\ m^2

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