then using x= ut+0.5at^2
the equation for the ball is x=2.4t+0.5*0.2*t^2
and for the boy the equation is x=0t+0.5*0.9*t^2.
x=x so 2.4t+0.5*0.2*t^2=0t+0.5*0.9*t^2
rearrange to find t.
sub t into the equation for the ball is x=2.4t+0.5*0.2*t^2.
then add that to 14.4m = total distance travelled by the ball.
so if that exceeds 60m, if not, you have your answer.
Hope this helps!