You jump across and down a crevasse from rest. You land on the other side at a speed of 10.5 m/s directed 67.6° below the horizontal. The other side is 4 meters lower.

How wide was the crevasse?

No Idea if I am doing this right.
But so far what I done was

10.5Sin(67.6) = - gΔt
and got -9.71