A boy wants to throw a letter wrapped over a stone to his friend across the street 40 m wide. The boy's window is 10 m below the friend's window. How should he throw the ball ?

A boy wants to throw a letter wrapped over a stone to his friend acros

1.	A boy wants to throw a letter wrapped over a stone to his friend across the street 40 m wide. The boy's window is 10 m below the friend's window. How should he throw the ball ?
Answer» ANSWER :`(u=31.29 MS^(-1),theta=26^(@)34)`