A car moving at the rate of 60 km/h, does a journey in 15 minutes. How long would it take, if the speed reduced to 36 km/h?
distance at original speed = (1/4)(60 km
= 15 km
time at reduced speed = 15/36 hours
= 5/12 hr
= 25 minutes
Thanks
To find out how long it would take for the car to complete the journey at a reduced speed, we can utilize the formula:
Time = Distance / Speed
Given that the speed of the car is initially 60 km/h, and the journey is completed in 15 minutes. We need to convert the time to hours, as speed is given in km/h.
15 minutes can be converted to hours by dividing it by 60:
15 minutes = 15 / 60 hours = 0.25 hours
Now, we can use the formula to calculate the initial distance:
Distance = Speed * Time
Distance = 60 km/h * 0.25 hours = 15 km
Now, let's calculate the time it would take for the car to travel at a reduced speed of 36 km/h:
Time = Distance / Speed
Time = 15 km / 36 km/h
Time = 0.4167 hours
To convert this time to minutes, we multiply by 60:
Time = 0.4167 hours * 60 minutes/hour = 25 minutes
Therefore, if the speed is reduced to 36 km/h, it would take approximately 25 minutes to complete the journey.