Horizontal and vertical speed

Question

An arrow is fired horizontally at 30m/s from a height of 80m. At what speed will it hit the ground in m/s?

Comments

Answer is 50m/s

Answer 1

Arrow is fired horizontally at a speed of .

Arrow is fired horizontally at a speed of .

Arrow is fired horizontally at a height of  from ground.

Find the final velocity of the arrow when it will hit the ground.

Newton thid law of motion: .

.

Final velocity of the arrow when it hits the ground is .

Comments

This is what i thought aswell but the answer says its 50m/s

---

Please check the updated answer

---

Thank you!