Eight
10 m = 1000 cm
10 meters = 393.700787 inches
69.11m2
1 decimeters= 10centimeter 1 dekameter= 10meter=1000centimeter so 1decimeter= 10/1000=0.001dekameter
Technically, it's 160.934 lengths (rounded). But that leaves you almost 37 inches short of the end,so you have to extend the mile just to get out of the pool.
The pressure underwater. On objects the pressure is 1ATM for every 10 meters underwater. human body feel 2atm in 10meter, but the real pressure on the body 1 atm, but due to our lounges the body suffers 2atm.
The question is meaningless. 10 m x 3 m x 6 m = 180 cubic metres. It cannot equal any number of square metres.
15
For every 10meter head there will be one kg/cm2 drop in pressure when the head is 30meter above then the required pressure should always be more than the head, if the pump is used only for filling the storage tank you need not go for much higher pressure pump that would make your operating cost high. It would be better if you opt for around 4 kg/cm2 pump provided your take into consideration the number of bends used in the piping and the amount of pressure dropped in the bends.