The equation of parabolic trajectory of the falling prey is
.
Differentiate with respect to
.

Arc length length formula :
.

Solve for
.

At
the value of
is zero.
Consider
.
Let
.
Differentiate with respect to
.

If
then
.
If
then
.
Substitute corresponding values in the above equation.
\
Let
.
Differentiate with respect to
.

Substitute corresponding values in the above equation.
\
.
Consider
.
Integral reduction :
.

Thus,
.
Substitute equation (2) in equation (1).
\
\ \


Substitute
in the above equation.


The distance traveled by the prey is
.
\
The distance traveled by the prey is
.