Using Feet as the common measure...
7 centimeters = 0.23 feet
So the volume is 20 * 70 *.23 cubic feet
Volume is 322 cubic feet.
Perimeter l+l+w+w= 70ft Area LxW =300 sqft
23.3m=70ft
70ft
70ft tall
412'
70ft
195.1 square meters
it is 980sq ft
14 to 5
If you can afford a 70ft yacht, you don't care.
To calculate volume, all the dimensions should be converted to the same unit, so that the volume will be in cubes of that unit. Since there are 12 inches in one foot, 4 inches = 1/3 foot. Multiplying the three dimensions together yields 700/3 cubic feet of concrete required, or as a decimal, 233.33....
Probably not. It would take 93 years, if your hair grows at three-quarters of an inch per month like most people's hair does.