A thin seamless pipe of diameter 'd' m is carrying fluid under a pressure of 'p' kN/cm2. If the maximum stress is not exceed 'σ' kN/cm2, the necessary thickness 't' of metal in cm will be given as
1
\(t\geq {pd\over 2\sigma}\ cm\)
2
\(t\geq {100pd\over 2\sigma}\ cm\)
3
\(t\leq {pd\over 2\sigma}\ cm\)
4
None of the above