Question

The doorsill of a campus building is h = 7 feet above ground level. To allow wheelchair access, the steps in front of the door are to be replaced by a straight ramp with constant slope 1/10, as shown in the figure. How long must the ramp be? [The answer is not 70 feet.]

Answer 1

a^2 + b^2 = c^2


7^2 + 70^2 = c^2


49 + 4900 = c^2


4949 = c^2


c^2 = 4949


c = sqrt(4949)


c = 70.349129


So the ramp is approximately 70.349129 ft

Answer 2

It worked! Thanks!