A car, moving at the rate of 60km /hr,does a journey in 15 min. How long would it take , if the speed is reduced to 36km /hr?
60 * 1/4 = 60/4 = 15 km
36 t = 15
t = 15/36 hour
15/36 * 60 = 25 minutes
since the distance is the same, rate*time is constant. So, you want m minutes where
36m = 15*60
To calculate the time taken for a journey at a different speed, we need to use the formula:
Time = Distance / Speed
Given that the car does a journey in 15 minutes (0.25 hours) at a speed of 60km/hr, we can rearrange the formula to find the distance covered:
Distance = Speed * Time
Distance = 60 km/hr * 0.25 hr = 15 km
Now, to find out how long it would take for the car to cover a distance of 15 km at a reduced speed of 36 km/hr, we can rearrange the formula again:
Time = Distance / Speed
Time = 15 km / 36 km/hr
Time ≈ 0.42 hours
Converting 0.42 hours to minutes:
Time ≈ 0.42 hours * 60 minutes/hr ≈ 25.2 minutes
Therefore, if the car's speed is reduced to 36 km/hr, it would take approximately 25.2 minutes to complete the journey.