It is required to make from sheet metal a closed cylindrical tank whose height is 1 m and the radius of whose base is 70 cm. How many square metres of sheet metal is needed?
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Step-by-step explanation:
as we know,
the formula of radius is 2π=22/7(radius+base)
so multiply 1*22/7*70(radius+base)
=1*22
=1*22(7+70)
=1*22*77
=1,694
Therefore 1,694m² is required for sheet metals
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