a river is 60 metre wide . a tree of unknown height is one bank.the angle of elevation of the top of the tree from the point exactly opposite to the tree , on the other bank is 30°. find the height of the tree

  1. 👍 0
  2. 👎 0
  3. 👁 439
  1. h/60 = tan 30°

    1. 👍 0
    2. 👎 0
  2. Tan theta=P/B
    Tan 30°=h/60
    h=34.64 m

    1. 👍 0
    2. 👎 1

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    You want to swim straight across a river that is 76m wide. You find that you can do this if you swim 28 degrees upstream at a constant rate of 1.7m/s relative to water. At what rate does the river flow? The angle is measure from

  2. trigonometry

    A line AB, 125 feet long, is measured along the sraight bank of a river. A point C is on the opposite bank. Angles ABC and BAC are found to be 65° 40' and 54° 30' respectively. How wide is the river?

  3. Physics

    A surveyor measures the distance across a straight river by the following methods: Starting directly across from a tree on the opposite bank, she walks 249 m along the river bank to establish a baseline. Then she sights across to

  4. maths

    A tree casts a shadow 4 metre long on the ground, when the angle of elevation of the sun is 45°.find the height of the tree

  1. geometry

    At a point on the ground 50 feet from the front of a tree, the angle of elevation to the top of the tree is 48 degrees. Find the height of the tree.

  2. physics 11

    A swimmer swims perpendicular to the bank of a 20.0 m wide river at a velocity of 1.3 m/s. Suppose the river has a current of 2.7 m/s [W]. (a) How long does it take the swimmer to reach the other shore? (b) How far downstream does

  3. Math

    Phoebe and Holden are on opposite sides of a tall tree, 125 m apart. the angles of elevation from each top of the tree are 47 degrees and 36 degrees. what is the height of the tree? My Answer: The top angle will be = 180 - (47 +

  4. Math

    An oil refinery is located 1 km north of the north bank of a straight river that is 3 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 8 km east of the refinery.

  1. physics

    Sheena can row a boat at 3.13 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.75 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head

  2. trigonometry

    . A surveyor wishes to measure the distance across Pasig River. She sets up her transit at a point C on the bank of the river, and sights on a point B on the other bank directly opposite her. Then she turns the transit through a

  3. Math

    A woman 1.7m in height observes the angle of elevation of a tree to be 24°. If she is standing 15m from the tree,determine the height of the tree

  4. trig

    From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the wide

You can view more similar questions or ask a new question.