Question 1055227
Planning for the smallest volume, the three sides are 3.8, 1.9, and 1.9 meters.  If the solution indicates that 7.3 cubic meters of soil is not enough, then it REALLY is not enough.


Outer dimensions  {{{3.8+1.5}}} and {{{1.9+2*1.5}}};


Volume of the flower bed:
{{{((3.8+1.5)(1.9+2*1.5)-3.8*1.9)(0.5)}}}


{{{((3.8+1.5)(1.9+3)-3.8*1.9)/2}}}

Use some of your algebra concepts or skills...
{{{(3.8*1.9+1.5*1.9+3.8*3+1.5*3-3.8*1.9)/2}}}


{{{(1.5*1.9+3.8*3+1.5*3)/2}}}


{{{(2.85+11.4+4.5)/2}}}


{{{highlight(9.375)}}}-----cubic meters of soil needed.


This is more than the "if" purchase of 7.3 cubic meters, so this 7.3 cubic meters soil is not enough.



-
MOST of the computations were done LAST.