A spherical shell of radius 1 m , made of a steel sheet of thickness 5 mm and completely filled with ice at 0{ }^{\circ} {\C} is immersed in boiling water. The time taken for the ice to melt completely is (Thermal conductivity of steel =45 {\Wm}^{-1} {\K}^{-1} and density of ice is 0.9 {\gcm}^{-3} )

TG EAMCET 29 Apr 2025 Shift 2 Paper

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A spherical shell of radius 1 m , made of a steel sheet of thickness 5 mm and completely filled with ice at 0‌∘C is immersed in boiling water. The time taken for the ice to melt completely is
(Thermal conductivity of steel =45Wm−1K−1 and density of ice is 0.9gcm−3 )

‌224 s
‌112 s
‌186 s
‌56 s

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