If the radii of the circles (x-1)^2+(y-2...

If the radii of the circles `(x-1)^2+(y-2)^2+(y-2)^2=1` and `(-7)^2+(y-10)^2=4` are increasing uniformly w.r.t. time as 0.3 units/s and 0.4 unit/s, respectively, then at what value of `t` will they touch each other?

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If the radii of the circles `(x-1)^2+(y-2)^2+(y-2)^2=1` and `(-7)^2+(y-10)^2=4` are increasing uniformly w.r.t. time as 0.3 units/s and 0.4 unit/s, respectively, then at what value of `t` will they touch each other?

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