A well with 14 m inside diameter is dug 8 m deep. The earth taken out of it has been evenly spread all around it to a width of 21 m to form an embankment. Find the height of the embankment.
Consider a well of 116 meter depth and a frog at the bottom of the well.
It climbs 9 meter in day time and slides down 5 meter during night.
How many days it needs to climb out of the well?
How many cubic feet of earth are removed...
...to make a hole 4 feet wide by 7 feet long by 2 feet deep?
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