a vertical pole stands on an horizontal ground. a student position due west of the pole observes that the angle of elevation of the top of the pole is 40 degree. when the the students moves 10 m due South. he observes that the angle of elevation of the top of the pole is 35 degrees. what is the height of the pole.

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point