Answer:
Ramp is 10.4 feet long.
Explanation:
Ramp AC is is making an angle of 15 with the ground BC.
The end C of the ramp is 10 feet from the base B of the building.
We have to find the length of ramp.
Let x feet is the length of the ramp.
Now Cos15° =

0.9659 =

x =

x = 10.35 ≈ 10.4 feet
Therefore, ramp is 10.4 feet long.