Two stars each of one solar mass (=2xx10...

Two stars each of one solar mass `(=2xx10^(30)kg)` are approaching each other for a head-on collision . When they are `10^9 km` apart, their speeds are negligible. What is the speed with which they collide ? The radius of each star is `10^4km` . Assume the stars remain undistorted until they collide. (Use the known value of G).

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The correct Answer is:

`2.6xx10^6 m*s^(-1)`

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