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1.    The area of a circle is given by:     A = π(r^2)

If the area of a circle is 153.94 cm2, what is the radius?

2.    If the area in (1) is doubled, what would the radius be?
in Grade 12 Maths Literacy by Silver Status (28,731 points) | 15 views

1 Answer

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1.    A = π(r^2)

153.94 cm2 = π(r^2)

153.94/π = r^2 = 49.00

r = √49 = 7 cm

2.    307.88 cm2 = π(r^2)

307.88/π = r^2 = 98.00

r = √98 = 9.8995.

Therefore new radius = 9.90 cm
by Silver Status (28,731 points)

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