A parti

1.	A parti
Answer» And displacement =pie r<br>Distance = 7pie r not 70 pie r<br>Time taken for1revolution=40sec40sec=1revolution1sec=1/40revolutionNo. Of revolutions in 2 min 20 sec =2×60+20×1/40=35revolutionsDistance travelled in one revolution=2pie rSo,Distance travelled in 35revolutions=35×2pie r=70 pie rDisplacement=0

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