On a new-moon day, a man on earth sees the annular eclipse of the sun? Diametre of the sun. How high would he have rise above the earth's surface so as just see the total eclipse of the sun? Diametre of the sun `=1.4xx10^(9)`m, diametre of the moon `=1.7xx10^(6)`m. Distances of the sun and the moon from the position of the man on earth are respectively,`1.5xx10^(11)`m. and `3.8xx10^(8)`m.

Answer

`2.0xx10^(5)km`