A car moves 40 km per hour for 15min and end with a speed of 60km per hour for the next 15 min. What is the distance covered by the car? pls answer this question fast ......its urgent
Answers
Answer:
Speed of car in first 15 minutes = 40 km/h
Distance covered = speed × Time taken
60 minutes = 1 hour
15 minutes =
60
15
hour
Distance covered = 240×
60
15
=10km
Speed of car in next 15 minutes = 60 km/h
Distance covered = 60×
60
15
=15km
∴ Total distance covered = (10+15)km = 25 km
∴ 25 km is correct
Explanation:
Let us assume the the distance covered by the car is "x" km.
Case 1)
A car moves with a speed of 40km/h for 15 minutes.
Here; speed = 40 km/hr and time = 15 min = 0.25 hr.
We know that,
Distance = Speed × Time
Substitute the known values,
→ x = 40 × 0.25
→ x = 10 km
So, the distance covered by the car in first half is 10 km.
Case 2)
The car cover next 15 minutes with a speed of 60 km/hr.
Again,
Distance = Speed × Time
→ x = 60 × 0.25
→ x = 15 km
Total distance covered by the car = Distance covered by the car in (first 15 minutes + next 15 minutes)
= (10 + 15) km
= 25 km
Therefore, the total distance covered by the car is 25 km.