Question

A truck moves at a speed of 10m/s in first minute,at a speed of 20m/sin the second minute and at a speed of 30m/s in the third minute.find the average speed of the car in these three minutes

Answer 1

Hey mate, Bon Jour,

Speed in first minute= 10m/s

Speed in second minute=20m/s

Speed in third minute=30m/s

Average speed= {(10+20+30)/3}m/s

= {60/3}m/s

= 20m/s

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Answer 2

Answer:

20 m/s

Step-by-step explanation:

Distance traveled in first minute = 60*10 = 600 m

Distance traveled in second minute = 60*20 = 1200 m

Distance traveled in third minute = 60*30 = 1800 m

Total distance traveled = 1800+1200+600 = 3600 m

Now total time taken = 180 seconds

Average speed = Total distance traveled/Total time taken

Average speed = 3600/180

Average speed = 20m/s