Sunday

November 23, 2014

November 23, 2014

Posted by **Anonymous** on Wednesday, January 23, 2013 at 11:35am.

A pole projecting outwards and upwards from the bottom of the window makes an angle of 30 degrees with the wall.

If the angle of elevation of the top of the pole observed from the same point on the ground is 60 degrees, what is the the length of the pole?

- maths -
**Steve**, Wednesday, January 23, 2013 at 12:34pmAh, such carefully contrived angles.

Label the

point on the ground Q

base of the wall A

bottom of the window B

top of the pole P

∆ABQ is a 30-60-90 ∆, so BQ=20

∆BPQ is also 30-60-90, so BP=20/√3

so, the pole is 20/√3 = 11.5m

**Answer this Question**

**Related Questions**

Mathematics - The angle of elevation of the top of a flagpole from a point on ...

precal - A pole 12 meters tall is perpendicular to level ground. A taut wire ...

maths - Two vertical poles, 3m and 7m long are on the same straight line with a ...

trig - A 52-foot wire running from the top of a tent pole to the ground makes an...

Physics - A playful college student tosses a water balloon out of his dorm ...

Maths - I have a diagram in which AB is a vertical cliff. BC is a vertical ...

Trig - A 60-foot flagpole stands on top of a building. From a point on the ...

math - a flagpole is 25 feet tall. a truck runs into the pole and bends it at ...

Maths - A surveyor measures the angle of elevation of the top of the mountain ...

Math - From a window 40 feet above the ground in a certain building, the angle ...