Answer:
Let's first convert the time taken to cover the distance at 45 km/h into minutes:
3 hours and 20 minutes = 3 x 60 + 20 = 200 minutes
The distance covered by the bus at 45 km/h is:
distance = speed x time
distance = 45 km/h x 200 minutes
distance = 9000/60 km
distance = 150 km
Now, let's use the distance and the new speed of 36 km/h to calculate the time it would take to cover the same distance:
distance = speed x time
150 km = 36 km/h x time
time = distance / speed
time = 150 km / 36 km/h
time = 4.1667 hours or 4 hours and 10 minutes (rounded to the nearest minute)
Therefore, it would take approximately 4 hours and 10 minutes to cover the same distance at a speed of 36 km/h.