Physics, asked by ayan90gupta, 4 months ago

a person moves for 20 sec such that for just 10sec he travells with respect 20 m/sec and remaining 10 sec move travel with speed 30 m/sec find avg speed???​

Answers

Answered by shinrojyon2006
1

Answer:

40 m/s

Explanation:

Given,

Total Time = 20 sec

Speed in the first 10 sec = 20m/s

Distance travelled in the first 10 sec = (20*10) m = 200m

Speed in the last 20 sec = 30 m/s

Distance travelled in the last 20 sec = (30*20)m = 600m

Avg. Speed = (600+200)/20

                    = 40m/s

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