A trough has a parabolic cross section
y
=
a
x
2
, where
a
is a constant. The height is
H
meters and the length is
L
meters. The trough is filled with water. For this problem, approximate the weight density of water to be
ρ
g
=
10
4
Newtons per cubic meter.
Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race