Wednesday

August 27, 2014

August 27, 2014

Posted by **Marie** on Tuesday, June 5, 2012 at 8:07pm.

- trig -
**Reiny**, Tuesday, June 5, 2012 at 8:33pmI drew triangle ABC where BC is a horizontal (the road) and angle B is 36° , and is on the left side of the diagram.

Angle C = 47° , on the right side

D is on BC and is the altitude of the mountain of 260 feet

I let BD = 200+x , and DC = 150+y

in the left triangle,

tan 36° = 260/(200+x)

200+x = 260/tan 36

x = 260/tan36 - 200 = 157.86 feet

find y in the same way.....

length of tunnel = x+y

= ....

- trig -
**Greg**, Tuesday, October 16, 2012 at 6:51pmy=92.5

x=157.9

x+y=250.4ft

**Related Questions**

trig - A tunnel for a new highway is to be cut through a mountain that is 260 ...

PreCal - Angel of Elevation: You are skiing down a mountain with a vertical ...

math - 1. A baseball diamond is actually a square, 90 feet on each side. What is...

math - 1. A baseball diamond is actually a square, 90 feet on each side. What is...

pre-calc - path of a frogs leap: a frog leaps from a box 3 feet high and lands 4...

trig - A survey team is trying to estimate the height of a mountain above a ...

Math - A square field has an area of 22,500 square feet. To the nearest foot, ...

math - a mountain, 200 feet above sea level, is near a valley 700 feet below sea...

Math - A doorway has the shape of a parabolic arch and is 16 feet high at the ...

calculus - 017 10.0 points Lance Armstrong is moving with speed 35 feet/sec and ...