A ramp must be at least 3 ft wide and extend at least 12 in. horizontally for every inch it rises vertically..

Question

a. how long must a ramp be if it reaches a step that is 2 1/4 ft. above the ground???

b. find the minimum amount of cement needed to make a ramp up to a step that is 2 1/4 ft. high??

can you please help me figure out a and b thanks alot :)

Answer 1

a. 2 1/4 ft = 27 inches

so the length is 27 ft

b. volume =area* w = 1/2* L*H*W

volume = 1/2*27*2 1/4*3 = 91.125 cu ft

or 3.375 cu yds of cement

Answer 2

I second the 27 foot ramp and 3.25 cubic yards of cement ( Actually it is precisely 3.375 cubic yards).

EDIT:

The guy above me forgot to divide his volume by 2. Which would also give you 3.375

Answer 3

The ramp must be 27.125 feet long.  Yhe amount of cement needed to fill it up if you were pouring it as a solid structure would be 3.25 cubic yards

Answer 4

2 and 1/4 feet equal 27 inches it needs to rise

since it rises 12 inches for each inch up 12 * 27 = 324 inches or 27 feet.

b since this would be a triangle the volume would be l*w*h *1/2

1yard*9 yards*.75yards=6.75 cubic yards of cement