Answers

2015-12-29T17:12:27+05:30
Volume of the cylinder = 1408 m

its height = 7 cm = 7/100 = 0.07 m

volume of cylinder = πr²h
                      1408   =   22/7 × r² × 0.07
                       1408 = 0.22 r²
                        1408/0.22 = r²
                         6400 = r²
                        √6400 = r
                        80 = r

so the radius of the cylinder is 80 m

lateral surface area = 2πrh
                               = 2 × 22/7 × 8 × 0.07
                              = 1.12 m²

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