Question

Greg wants to find the amount of concrete needed to cast a pillar he has designed. The pillar will have a base area of 1/28 square yard and a height of 1/14 yard. How much concrete does he need to cast the pillar?
A. 1/256 cubic yard
B. 1/392 cubic yard
C. 1/484cubic yard
D. 1/512 cubic yard

Answer 1

Answer:

  B.  1/392 cubic yard

Step-by-step explanation:

The volume is the product of base area and height:

  V = Bh = (1/28 yd²)·(1/14 yd) = 1/(28·14) yd³ = 1/392 yd³

Answer 2

Answer:

B. 1/392 cubic yard

Step-by-step explanation:

Given,

The base area of the pillar, B = $\frac{1}{28}$ square yard ,

Its height, h = $\frac{1}{14}$ yd

Thus, the volume of the pillar would be,

$V=B\times h$

$=\frac{1}{28}\times \frac{1}{14}$

$=\frac{1}{28\times 14}$

$=\frac{1}{392}\text{ square yard}$

Since, the concrete he needs to cast the pillar = Volume of the pillar

= $\frac{1}{392}\text{ square yard}$

Option 'B' is correct.