a car moves with a speed of 30km/h for 10 minutes and then 50km/h for 20 minutes.what will be the total distance covered by the car for 30 minutes?
D = s * t
D = 30(10) + 50(20) = ?
divide those time values by 60, since they are in minutes, not hours.
To find the total distance covered by the car in 30 minutes, we need to calculate the distance covered in each part of the journey separately and then add them together.
First, let's calculate the distance covered in the first 10 minutes when the car was moving at a speed of 30 km/h. We can use the formula:
Distance = Speed × Time
Distance = 30 km/h × 10 minutes
= (30 km/h) × (10/60) hours
= 5 km
So, the distance covered in the first 10 minutes is 5 km.
Next, let's calculate the distance covered in the next 20 minutes when the car was moving at a speed of 50 km/h. Again, we can use the formula:
Distance = Speed × Time
Distance = 50 km/h × 20 minutes
= (50 km/h) × (20/60) hours
= 16.67 km
So, the distance covered in the next 20 minutes is 16.67 km.
Finally, to find the total distance covered in 30 minutes, we add the distances obtained from the two parts of the journey:
Total Distance = Distance (first 10 minutes) + Distance (next 20 minutes)
= 5 km + 16.67 km
= 21.67 km
Therefore, the total distance covered by the car in 30 minutes is approximately 21.67 km.