In the above problem what is the pressure necessary to accomplish this

1.	In the above problem what is the pressure necessary to accomplish this task (g = 9.8m/s^(2) )
Answer» `1.87xx10^(5)N//s^(2)` `18.7xx10^(5)N//s^(2)` `2.87xx10^(5)N//s^(2)` `28.7xx10^(5)N//s^(2)` ANSWER :A

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