If circles x and y have the same area and circle x has a circumference of 10π, half of the radius of circle y is:
Answers:
A) 16 B) 8 C) 4 D) 2.5 E) 1
x be radius of circle x   y be radius of circle y   given:   pi*x^2 = pi*y^2   also,   2*pi*x = 10*pi   x =5   thus y = 5   y/2 = 2.5   Ans: 2.5
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If circles x and y have the same area and circle x has a circumference of 10π, half of the radius of circle y is: