Question

car travels a distance with a speed of 60 kilometre per hour in 15 minutes and then the remaining distance at a speed of 90 km per hour in the next 15 minutes calculate the total distance covered by the car​

Answer 1

Answer:

27.503km

Explanation:

Given:

V₁=60kmph≈16.67mps

V₂=90kmph=25mps

T₁=T₂=15min=15×60=900sec

Speed=Distance/Time

V₁=S₁/T₁

16.67=S₁/900

16.67×900=S₁

S₁=15,003m

V₂=S₂/T₂

S₂=25×900

S₂=22,500m

S=S₁+S₂ [S is total distance covered]

S=15,003+22,500

S=27,503m or 27.503 km

Answer 2

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