4.) A car moves with a speed of 40 km/h for 10 minutes and then 60 km/h for 20 minutes.
What will be the total distance covered by the car after 30 .
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Answer:
i am taking the 30 as min.
then 30*60=1800sec
converting 40 km/h in m/sec we get
40*5/18=11.11 m/sec
speed = distance/ time
in 10 min. he has covered 11.11*10*60= 6666.66 m
similarly in 20 min
60*5/18*60*20= 20,000 m
add them you will get the answer in meters
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