Question

What is the size of black hole.

Answer 1

Stellar-mass black holes are typically in the range of 10 to 100 solar masses, while the supermassive black holes at the centers of galaxies can be millions or billions of solar masses. The supermassive black hole at the center of the Milky Way, Sagittarius A*, is 4.3 million solar masses.

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Answer 2

HEY THERE FRND..
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THE SIZE OF THE BLACK HOLE ANY BUDDY DONT KNOW THE PROPERLY BCZ ITS SMALL ONE AND BIG 1 DIFFRENT TYPE

BUT THE METHEMETICALLY TYPE

SIZE OF THE BLACK HOLE IS ""5 KM""
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, THE SIZE OF THE BLACK HOLE IS GIVEN BY 2GM/c2 WHERE G IS THE GRAVITATIONAL CONSTANT, M IS THE MASS OF THE BLACK HOLE AND C IS THE SPEED OF LIGHT.. .


WHEN ASTRONOMERS REFER TO THE "SIZE" OF THE BLACK HOLE, THEY ARE TALKING ABOUT THE EVENT HORIZON. 

NO EVEN LIGHT IS THE ESCAPE WITHIN THE HORIZONTAL EVENT..


THANK YOU..