Answer:
Stain required to stain the ramp = 2 quarts
Explanation:
Area of the wheelchair ramp to be stained = Surface area of the ramp - Area of the rectangular base
Surface area of the ramp = 2(area of the triangular base) + (perimeter of the base)(height)
Area of the triangular base =

=

=
in²
Perimeter of the triangular base =

= 25 +
+ 25 +

= 50 +

= 50 +

=
ft
Surface area of the ramp =
+
- 25×5
=

=

= 187.92 square feet
Since, 100 square feet area is covered by the stain = 1 quart
Therefore, 187.92 square feet will be covered by the stain =

= 1.8792
≈ 2 quarts