As an airplane rises, the outside temperature drops 3.6 degrees Fahrenheit for each 1000 feat of elevation gain. Suppose the outside temperature is 65 degrees Fahrenheit on the ground and -43 degrees Fahrenheit at cruising altitude. How high is the plane at cruising altitude?

Answer:30000 feetStep-by-step explanation:temperature on ground level = 65 °Ftemperature at cruising altitude = -43 °Ftotal decrease in temperature = 65 - (- 43) = 65 + 43 = 108 °Ffor each 1000 feet elevation temperature drops by 3.6 °Fand we have the total drop of temperature as 108 °F.so,  Height of plane at cruising altitude = (drop in temperature/ 3.6) X 1000                                                                  =[tex]\frac{108}{3.6} X 1000[/tex]                                                                  = 30000 feet