The length of the route that the bus travels in 7/10 hours is 20 1/4 km. The bus travels along the route

The length of the route that the bus travels in 7/10 hours is 20 1/4 km. The bus travels along the route at a speed of 45 km / h and makes 10 stops. How long does each bus stop if at each stop it costs the same time?

we find the time that the bus spends on passing without stops 201/4: 45 = 9/20 (h)
then we find the time that the bus spends at the stop 7/10 – 9/20 = 1/4 (h)
1/4 h = 15 min.
find the duration of one stop 15: 10 = 1 1/2 (min)
The answer is the duration of each bus stop – 1 1/2 minutes.