A student takes 50gm wax (specific heat = 0.6 kcal/kg°C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively             

Since specific heat = 0.6 kcal/gm x °C = 0.6 cal/gm x°C
From graph it is clear that in a minute, the temperature is raised from 0°C to 50°C.
Heat required for a minute = 50 x 0.6 x 50 = 1500 cal.
Also from graph, Boiling point of wax is 200°C