Question

The car moves with a speed of 90 km/h for 20 minutes and then with a speed of 60 km/h for the next 20 minutes.Find the total distance covered by the car in these 40 minutes ​

Answer 1

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

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