by driving a car at a speed of 50km/hr . I reach the airport in 30 minutes.at what speed should I drive to reach in 25 minutes?
Speed of car = 50 km/hr
Time taken = 30 min = 30/60 hr = 0.5hr
Distance to airport =>
Speed = Distance / time
50 = distance to airport/ 0.5
Distance 50*0.5 = 25km
Required time to reach airport is 25 min = 25/60 hr
Distance = 25 km
Required speed = distance / time
25/(25/60)
60 km/hr
50 (30/25) = 2*30 = 60
To find the speed you should drive to reach the airport in 25 minutes instead of 30 minutes, we can use the formula:
Speed = Distance / Time
Since the distance to the airport remains the same, we only need to adjust the time. Let's calculate the current distance to the airport.
Distance = Speed × Time
Distance = 50 km/hr × (30/60) hr
Distance = 50 km/hr × 0.5 hr
Distance = 25 km
Now, since we want to reach the airport in 25 minutes instead of 30 minutes, we need to calculate the new speed using the new time.
Speed = Distance / Time
Speed = 25 km / (25/60) hr
Speed = 25 km / (5/12) hr
Speed = 25 km × (12/5) hr
Speed = 60 km/hr
Therefore, to reach the airport in 25 minutes instead of 30 minutes, you should drive at a speed of 60 km/hr.