Answer :

luana
From the law of the lever: 

mechanical advantage= input arm : output arm

input arm- a
output arm-b
[tex]mechanical\ advantage= 6\\\\ 6=\frac{a}{0,8}\ \ |*0,8\\\\ 6*0,8=a\\\\ a=4,8m [/tex]
Input arm is equal 4,8m

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