Weight

Algebra

Weight

Postby Guest » Tue Feb 14, 2017 2:00 pm

Concrete steps have the following dimensions:

Front; 30" wide.

Height; 8" (2 steps).

Width; Bottom, 11"; Top, 14".

Height; 8".

Side; Width, 25" ; Height; 16" (the side is "L" shaped in illustration).

Determine weight. Concrete weighs 150 lbs. / cu. ft.

Unsure how to proceed. Thanks.





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Guest
 

Re: Weight

Postby Guest » Sat Mar 04, 2017 12:40 am

Please reply, Thanks.

Guest
 

Re: Weight

Postby Guest » Sun Mar 05, 2017 1:31 am

Find the volume of the figure in feet. It is compound by 2 parallelepipeds. Convert inches to feet then multiply the volume by 150 and get the weight.

Guest
 

Re: Weight

Postby Guest » Sun Mar 05, 2017 10:40 pm

Ok, my attempt:

30" * 25 " * 16" = 2.5' * 2.08' * 1.33' = 6.916 cu. ft.

6.916 * 150 = 1037.4 = 1037 lbs.

Where am I correct ?

Guest
 


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