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If a circular piece of tin has a measured radius of 2.6 cm . What is circumference ? |
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Answer» Solution :`r=2.6cm` Circumference of circular dise = `2pir=2xx3.1428xx2.6` Here `2.6`has onley 2 significant DIGITS. Hence in the above multiplication `PI` VALUE should be written with `2+1=3` significant FIGURES. `pi=3.1428=3.14` Circumference `=2xx3.14xx2.6=16.328` This is to be rounded off to 2 significant digits. the result is 16. |
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