Th e fl oating platform shown is supported at each corner by a hollow sealed cylinder 1 m in diameter. Th e platform itself weighs 30 kN in air, and each cylinder weighs 1.0 kN per meter of length....

Th e fl oating platform shown is supported at each corner by a hollow sealed cylinder 1 m in diameter. Th e platform itself weighs 30 kN in air, and each cylinder weighs 1.0 kN per meter of length. What total cylinder length L is required for the platform to fl oat 1 m above the water surface? Assume that the specifi c weight of the water (brackish) is 10,000 N/m3 . Th e platform is square in plan view