A circular column of length 'l' and diameter 'd' has has Euler crippling load of P1 kN. If the diameter is reduced by 20 %, then the new criplling load becomes P2 kN. What is the relation between P1 and P2?
1
\(\left(\frac{P_2}{P_1}\right)_{cr}=0.8^4\)
2
\(\left(\frac{P_2}{P_1}\right)_{cr}=0.64^2\)
3
Both (1) and (2)
4
None of the above