Question

A particle of mass 'm' is projected with a velocity v = kVe (k < 1) from the surface of the earth.
(Vₑ = escape velocity)

The maximum height above the surface reached by the particle is :
a. R(k/1-k)²
b. R(k/1+k)²
c. R²k/1+k
d. Rk²/1-k²