The long diagonal will be sqrt(7500) cm = 86.60 cm (to 2 dp)
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Using Pythagoras' theorem the length of the diagonal is 20 feet
The length of the diagonal of a square whose side lengths are 7 square root 2 (9.89949494) is: 14 units.
13 57/64 "
Firstly you need to work out the length of a side. Using Pythagorean Theorem for a right angled triangle a2+b2=c2 where a = the length, b = height & c = diagonal since c = 8 and a = b are the same 2a2 = 64 a2 = 32 a = 5.657 cm since the area of the square is a2 then area = 32cm2
9 cm * 4 cm * 7cm = 252 cm3