Question

# The radius of the circle passing through the foci of the ellipse $$\frac { { x }^{ 2 } }{ 16 } +\frac { { y }^{ 2 } }{ 9 } =1$$ and having its centre at $$\left( 0,3 \right)$$ is ___________.

A
6
B
4
C
3
D
2

Solution

## The correct option is B $$4$$$$ae=\sqrt { 7 }$$$$r=\sqrt { { ae }^{ 2 }+{ b }^{ 2 } }$$$$=\sqrt { 7+9 } =4$$Mathematics

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