2. The ratio of radius(r) to diameter (d) of circle is …… (A) 1:2 , (B) 2:1 , (C) 1, (D) none of these About the author Allison

ANSWER : r : d d = 2r we know the diameter of the circle the double of radius or radius is the half of diameter . r : d = 1 : 2 The answer is A) 1 : 2 Note : if the radius is x diameter is 2x , if radius is 2 diameter is equal to 2×2 = 4 . Reply

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A) 1:2

ANSWER:r:dd = 2r

we know the diameter of the circle the double of radius or radius is the half of diameter .

r:d=1:2TheanswerisA)1:2Note:iftheradiusisxdiameteris2x,ifradiusis2diameterisequalto2×2=4.