The speed of a metro train is 54 km/hr excluding stoppage time and if including
stoppage the speed is 45 km/hr then for how many minutes does it stop per hour ?
To find out the duration of stoppage time per hour, we first need to understand the concept of speed.
Speed is defined as the distance traveled per unit of time. In this case, we are given two speeds: 54 km/hr (excluding stoppage time) and 45 km/hr (including stoppage time).
We can calculate the difference between these two speeds to determine the duration of stoppage time per hour.
Speed excluding stoppage time = 54 km/hr
Speed including stoppage time = 45 km/hr
Duration of stoppage time per hour = Speed excluding stoppage time - Speed including stoppage time
Duration of stoppage time per hour = 54 km/hr - 45 km/hr
Duration of stoppage time per hour = 9 km/hr
Since the duration of stoppage time is given in kilometers per hour, we need to convert it to minutes per hour.
To convert kilometers per hour to minutes per hour, we will use the relationship that 1 kilometer per hour is equal to 60 minutes per kilometer.
Duration of stoppage time per hour = 9 km/hr * (60 minutes/km)
Duration of stoppage time per hour = 540 minutes/hr
Therefore, the metro train stops for 540 minutes per hour.