on turning a corner a motorcyclist rushing

Question

at 44 m/s. finds a child on the road 100 m away. he applies the brake so as he stops the motorcycle within 1m of the child. calculate the time required to stop?

Answer 1

vf^2=vi^2+2ad

d=99m
solve for a

then,
vf=vi+at solve for t.

Answer 2

2.25 seconds