2. a contractor is building a set of stairs out of concrete. each stair is exactly the same length, width, and height.

(a) which solid figures can the stairs be broken into? what are the dimensions of each solid figure?
(b) how much concrete will be needed to form the stairs?

Answer with explanation:

a)

The solid figures in which the stairs can be broken into is:

Rectangular prism.

The dimensions of each solid figure are:

l=2.4 m, w=0.4 m and h=0.6 m.

b)

To find the amount of concrete needed for the stairs we need to add up the volume of each of the solid figure in which the stairs are broken into.

As we know that after breaking the stairs we will obtain 6 equal rectangular prism with dimensions as mentioned in part a)

Hence, Volume(V) of 1 rectangular prism=l×w×h

V=2.4×0.4×0.6

V=0.576 cubic meters.

Hence, amount of concrete used=6×0.576

Amount of concrete used=3.456 cubic meters.

answer: procent 54 wynosi 33,33%

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step-by-step explanation: