2 Answers

Jinghao Shi · Answer 1 · 2021-07-10T15:43:23+0000

Answer: 1.75 cubic feet concrete is needed.

Explanation:

Alright, lets get started.

The volume of the pillar is :
$\pi r^2h$

We have given the height is 5 feet.

We have given the diameter is 4 inches.

So the radius will be :
$(4)/(2)=2 \ inches$

Converting inches into feet.

The radius will be :
$(2)/(12) \ feet$
= 0.167 feet

So the volume of the cylinder will be :
$\pi * 0.167^2*5$

So the volume of the cylinder will be :
$0.4380 \ cubic \ feet$

As there are 4 pillars, so total volume will be :
4*0.4380

So, total volume will be :
$1.75 \ cubic \ feet$

Hence 1.75 cubic feet concrete is needed. : Answer

Hope it will help :)

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