Building a is 160 feet shorter than building b. the total height of the two buildings is 1530 feet. find the height of each building.

Let x be the height of building A.
A = x
B = x + 160

Total height = 1530
x + x + 160 = 1530
2x + 160 = 1530
2x = 1370
x = 685 feet

A = 685
B = 685 + 160 = 845

Building A = 685 ft and Building B = 845 ft.

First, you have to write out the problem
b-160=a
a+b=1530

Then, substitute b-160 for a in the second equation
b-160+b=1530

Simplify
2b=1690

Simplify again
b=845

Then plug into the first equation (b-160=a)
845-160=a

Simplify
685=a

Check
685+845=1530

Final
a=685
b=845

Are you trying to figure out the volume?