In general, you can't convert between dissimilar units - in this case, time and distance.
However, for a specific speed, you can use the formula:
distance = speed x time
150 km (93miles) northeast to Sofia
so many hours
10 hours
How many hours is 101 minutes
5 hours
How many hours does it sleep
how many hours do agriculturalist
12 hours.
6 hours from 4pm to 10pm
how many hours flight from us to Malaysia
There are 3 hours in 3 hours.
There are 34/5 hours in 3.8 hours.