Posted by liz on Wednesday, August 25, 2010 at 6:17pm.
The volume of earth removed is a rectangular prism, the volume of which is the planar area multiplied by the depth.
V = 72 hectares * 29 m
= 72*104 m² * 29 m
= 72*104*29 m³
Now one cubic kilometer contains
(1000)³ m³
= 1,000,000,000 m³
All you need to do is to convert the previous answer into km³.
.0207 km3
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