the density of the atmosphere at sea level is 1.29 kg/m². assume that is does not change with altitude.Then how high would the atmosphere extend?

 Here, h=?

density=1.29 kgm^-2 (D)

P=1.01*10⁵ Pa at sea level

^{We know th}at pressure exerted by a fluid column is given as

P=h*D*g

Therefore,

h*1.29*9.8=1.01 *10⁵

=> h= 1.01*10⁵/1.29*9.8

=> h=7989m (approx)

Thus the atmosphere would extend upto a height of 7989 m.