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A screw gauge having `100` equal division and a pitch of length `1mm` is used to measue the diameter of a wire of length `5.6cm`. The main scale reading is `1mm and 47^(th)` circular division coincides with the scale. Find the curved surface area of wire in `cm^(2)` to appropriate significant fihure. `(use pi = (22)/(7)`A. `2.6cm^(2)`B. `2.587cm^(2)`C. `2.58cm^(2)`D. `2.5872cm^(2)` |
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Answer» Correct Answer - A `Value of 1MSD=1mm=0.1cm` `Value of 1CSD=(1)/(100)=mm=0.001cm` `diameter(d)=1.47mm=0.147cm` and `l=5.6cm` curved surface area `A=(2pir)l` |
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