a car moves with the speed of 40km/h for 15 minutes and then with the speed of 60km/h for the next 15 minutes. Find out the total distance by the car in this 30 minutes
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a car moves with the speed of 40km/h for 15 minutes and then with the speed of 60km/h for the next 15 minutes. Find out the total distance by the car in this 30 minutes
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Answer:
25
Explanation:
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
Since the car at first travels at a speed of 40 Km/Hr for 15 mins and then at the speed of 60 kms/Hr for next 15 mins.
The the average speed of the car = (40 + 60) / 2 = 100/2 = 50 Kms/Hr. = 50 Kms/60 mins = 56/60 = 0.833334 Kms/Min
So the distance travelled by the Car in 30 mins = 0.833334 x 30 = 25 Kms
Ans: 25 kms