Q16 of 70 Page 19

A right curcular cylindrical tunnel of diameter 2 m and length 40 m is to be constructed from a sheet of iron. The area of the iron sheet required in m2, is

Given,


Diameter of cylindrical tunnel = 2 m


So radius =


Length of tunnel = 40 m


Area of iron sheet required = 2πrh


= 2π×1×40 = 80π m2

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