Question

An underground parking lot is being constructed 8 m below ground level. If the exit ramp is to rise at a 15 degree angle, how long will the ramp be?

Answer 1

`color(olive)("Length of the ramp " bar (AC) = b = 30.9 " m"`

Explanation:

Given : `hat C = 15^@, bar(AB) = c = 8 m, " To find " bar(AC) = b`

`b = c / sin C, " Applying Pythagoras theorem"`

`b = 8 / sin 15 = 30.9 " m"`

`color(olive)("Length of the ramp " bar (AC) = b = 30.9 " m"`