Question 936192
 The airplane takes off 12 1/2 miles south of a city 
speed  =180  mph
duration  = 45 min  = 45/60  hrs  = 3/4 hr
 distance traveled during 45 min  =  speed * time 
                                   ={{{180*(3/4)}}}
                                      =45*3
                                     =135  miles
so plane traveled 135 miles due north
but plane already traveled 12.5 miles south
 effective distance traveled in north direction  = 135-12.5 
                                                  =122.5 miles
plane is 122.5 miles north to the city after 45 min