The two circles \[{{x}^{2}}+{{y}^{2}}-4y=0\]and \[{{x}^{2}}+{{y}^{2}}-8y=0\] [BIT Ranchi 1985]

The two circles \[{{x}^{2}}+{{y}^{2}}-4y=0\]and \[{{x}^{2}}+{{y}^{2}}-

1.	The two circles \[{{x}^{2}}+{{y}^{2}}-4y=0\]and \[{{x}^{2}}+{{y}^{2}}-8y=0\] [BIT Ranchi 1985]
A.	Touch each other internally
B.	Touch each other externally
C.	Do not touch each other
D.	None of these
Answer» B. Touch each other externally

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The two circles \[{{x}^{2}}+{{y}^{2}}-4y=0\]and \[{{x}^{2}}+{{y}^{2}}-8y=0\] [BIT Ranchi 1985]

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