A player thous ball upwards with initial speed 29.4 m/s'^-1. The time taken by the ball to return to the players hand is. (Take g= 9.8m/s^-2 and negleted air resistance)​

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.