Z3
26. the entrance of the old town library is 2.3 feet
above ground level. a ramp from the ground
level to the library entrance is scheduled to be
built. the angle of elevation from the base of the
ramp to its top is to be 15º. find the length of
the ramp.

The length of ramp is 8.9 meters approximately.

Given that, the entrance of the old town library is 2.3 feet above ground level.  

A ramp from the ground level to the library entrance is scheduled to be built.  

The angle of elevation from the base of the ramp to its top is to be 15º

We have to find the length of the ramp.

Let the length of ramp be “n” feet.

Now, if we observe there forms a right angle triangle with ramp as hypotenuse and height of entrance as opposite side for angle of elevation 15 degrees.

The diagram is attached below

In the figure,

AC = length of ramp

AB = height above ground level = 2.3 feet

angle of elevation = 15 degree

Then, we know that,

where θ is angle of elevation.

Hence, the length of the ramp is 8.9 meters approximately.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

2160ft3

step-by-step explanation: