what will be the escape speed from a planet of mass 6*10¹⁶ kg and radius 3.6*10⁴..

Given, M = 6 X 10¹⁶ kg
R = 3.6 X 10⁴ m
Escape velocity can be calculated using the formula :
v_e = $\sqrt{\frac{2 G M}{R}}$
where G = 6.67 X 10^-11N m²kg^-2.
Put values of M, G and R in the above formula to get your answer.