send the solutions quickly please

A thermometer reads 30C at a steady-state, At time t=0, the thermometer is placed in a water bath maintained at 80C. Determine the time needed (in seconds) for the thermometer to read 70C. Data: Cylindrical bulb of a typical laboratory thermometer is 3 mm in diameter and 12 mm long Density of mercury = 13600 kg/m Density of hot water = 1000 kg/m Specific heat of mercury = 0.033 kcal/kg C. Specific heat of water = 1 kcal/kg C. Heat transfer coefficient of still water = 7.5 kcal/min m?.c. Heat transfer coefficient of air=0.5 kcal/min m C. Formula to calculate volume of bulb is strh and area of the bulb is 2.tr(h+r)