Question 3: Area of a circular table is 154 square feet. What is the radius and diameter of the table.

asked Jul 2, 2013 in Algebra

Solution:

Given
Area of the circular table (A) = 154 square feet

Let 'r' be the radius and 'd' be the diameter of the circle

Use the formula,

A = ∏ r2

=> 154 = 22/7 * r2

=> 154 x 7/22 = r2

=> 7 x 7 = r2

=> r = 7

and d = 2 r = 2 x 7 = 14

=> Radius of circular table = 7 feet

and diameter = 14 feet.

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answered Jul 2, 2013 by ~Rookie~ (120 points)
edited Jul 18, 2013

Area of a circular table is 154 square feet. Area of circle is pi*r^2.

So, 154 = 22/7 * r^2

r^2 = 154*7/22

r^2 = 49

r = 7 feet <= Radius

Diameter = 2*r = 2*7 = 14 feet

answered Dec 12, 2013 by ~Rookie~ (90 points)