A Ladder 10 Feet Long Is Leaning Against a Wall $6 \mathrm { tt } / \mathrm { s }$

A ladder 10 feet long is leaning against a wall. If the foot of the ladder is being pulled away from the wall at 3 feet per second, how fast is the top of the ladder sliding down the wall when the foot of the ladder is 8 feet away from the wall?

A) $6 \mathrm { tt } / \mathrm { s }$

B)
$1 \mathrm { ft } / \mathrm { s }$
C) $3 \mathrm { ft } / \mathrm { s }$
D) $10 \mathrm { ft } / \mathrm { s }$
E) $5 \mathrm { ft } / \mathrm { s }$
F) $8 \mathrm { ft } / \mathrm { s }$

G) $2 \mathrm { ft } / \mathrm { s }$

H) $4 \mathrm { ft } / \mathrm { s }$