What is the initial velocity of a projectile that is launched at a 25o angle and travles 70 km in 25 seconds?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

With i really need the correct answer!

If steel is more dense that lake water, why can a boat float