Question

The uniform Federal accesibility standards specify that the ramp angle used for a wheelchair ramp must be less than or equal to 4.76. if the length of a ramp is 20ft and the vertical rise is 17 in, dos the angle of the ramp meet the standards?

A. No, its 4.78
B. Yes, its 4.06
C. Yes its 3.6
D. no, its 5.4

Answer 1

First you should convert 20 ft to inches. Then you will be using the same units for the problem.

Next, it helps to draw a right-angled triangle with appropriate dimensions.

Then use the trigonomic 'tan(x)' operator. (PS. tan=opposite/adjacent)

Then your calculator comes into play. Use the tan^-1 button with the fraction and you will find the angle.

If you need more help, ask :) I will be happy to explain

Answer 2

how do you convert?

Answer 3

How many inches are in a foot?

Answer 4

(Sorry I use metric system)

Answer 5

12

Answer 6

Ok so there's 20 ft, 12 inches make up 1 ft, therefore 20*12 inches = ?
That's how you convert

Answer 7

240in

Answer 8

All right! Now you have a right-angled triangle, (it helps to draw one) in which the base is 240, height is 17. You can imagine the hypotenuse being the ramp..! Now the angle you want to find is the one where the hypotenuse meets the 240 side.

Answer 9

You know how to do this?