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`(25)/(12)xx(L)/sqrt(F//mu)``(10L)/sqrt(F//mu)``(4L)/sqrt(F//mu)``(L)/sqrt(F//mu)`

Answer :

bSolution :

`v_(1)=sqrt((F)/(mu))` <br> `v_(2)=sqrt((F)/(4mu))=(1)/(2)sqrt((F)/(mu))` <br> `v_(3)=sqrt((F)/(9mu))=(1)/(3)sqrt((F)/(mu))` <br> `v_(4)=sqrt((F)/(16mu))=(1)/(4)sqrt((F)/(mu)` <br> Total time taken <br> `=(L)/(v_(1)+(L)/(v_(2)+(L)/(v_(3)+(L)/(v_(4)=(10L)/(sqrt(F//mu))`