05-04-2015
Mathematics

Answered

the cross-sectional area of a hole is 725 cm². Given that the area of a circle is A= πr², find the radiusof that hole.

Answer :

princestien princestien

06-04-2015

given the formula, A= πr², to find the radius, make r the subject of the equation.
   r = √(A/π)
    where we know π= 3.142 corrected to 3 decimal places,
   our radius r = √(725/3.142)
      = √230.745
      = 15.190cm

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