3.1415
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The digit in position 271 after the decimal point is 4.
Area is (Pi/4) x d2 = (Pi/4) x 36 = Pi x 9 = 28.2743 square inches (to nearest 4th decimal)
Volume = (Pi/4) x d2 x h = (Pi/4) x 16 x 40 = Pi x 160 = 502.655 cu. cm. (to nearest 3rd decimal.
3.14159 to 5 decimal places. As the the 5th digit after the decimal place is a 9 when quoting to 4 decimal places the 4th digit is rounded up so Pi to 4 decimal places is: 3.1416 If you put it that way... 3.14159265358979323 So technically I am right but, If you round it up you get 3. Just little 3
Area = pi*r^2 = 4*pi = 12.6 square cm rounded to 1 decimal place.