<PRE><B>Question 1170094</B>
An irrigation canal is 10 kilometers long and 2 meters deep.
it is 4 meters wide at the top and 2 meters wide at the bottom .
how many cubic meters of earth were excavated to make the canal
:
Find the area of the trapezoid shape of the canal
A = {{{h/2}}}(a+b)
A = {{{2/2}}}(2+4)
A = 6 sq meters
1 km = 1000 meters
6 * 10000 = 60,000 cu meters of earth</PRE>