Question 40961
Let speed in city = v km/hr.
So speed in highway = 2v km/hr.
Distance traveled in the city in 1 hour at speed 'v' km/hr is 'v' km.
Distance traveled in the highway in 4 hours at speed '2v' km/hr is '8v' km.
So total distance traveled = v + 8v = 9v km
But given total idstance traveled is 387 km.
So 9v = 387 
or v = 387/9 = 43
So the speed of bus in the city was 43 km/hr.