A transistor with a height of 0.4 cm and a diameter of 0 6 cm is mounted on a circuit boar...

A transistor with a height of 0.4 cm and a diameter of 0 6 cm is mounted on a circuit board. The transistor is cooled by air flowing over it with an average heat transfer coefficient of 30 W/m2∙K.If the air temperature is 55°C and the transistor case temperature is not to exceed 70°C, determine the amount of power this transistor can dissipate safely. Disregard any heat transfer from the transistor base.