science problem

On the planet Elvis, an astronaut kicked a stone at an angle of 45 degrees to the horizontal. The stone's initial speed was 12m/s. The stone travelled 25 m horizontally before hitting the ground. What is the value of 'g' on Elvis?

with working plz...tell me how?

VECTORS? DO YOU USE IT?

g=5.8 m/s now gtfo

25 = 12cos45 * t
t = 25 root 2 / 12
0 = ut - 1/2at^2
2u = at
a = (24/root 2)/(25root 2/12) = 5.76ms^-2