Equilateral triangle QRS is shown below. what can be determined about the angles in Triangle QRS all angles are acute and measure 60° . one angle is right angle that measures 90°. one angle is an obtuse angle that measures more than 90°​

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.