Question

13.
A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h
for the next 15 minutes. What is the total distance covered by the car?​

Answer 1

Answer:

25km is the correct answer

Answer 2

Answer:

24.993 km

Explanation:

distance 1:-

speed=40 km/h

time= 15 minutes

40×5/18 (conversion to m/s)

11.11m/s

15×60 ( conversion to seconds)

900 s

speed= distance travelled/ time taken

11.11=distance/900

11.11×900=distance

9,999m=distance 1

distance 2:-

speed=60 km/h

time=15 minutes

60×5/18 ( conversion of speed to m/s)

16.66 m/s

time=15×60

900 s

speed=distance/time

16.66=distance/900

16.66×900=14,994 m (distance 2)

total distance:-

9,999+14,994=24,993 m

=24.994 km/h

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