Fe metal sheet

For one product, 5/8 of the metal sheet are consumed, to the second 5/6 of remains. What part of the sheet metal is consumed for both products together?

Correct result:

x =  0.9375

Solution:

a=58=0.625 b=56⋅ (1−a)=56⋅ (1−0.625)=516=0.3125  x=a+b=0.625+0.3125=1516=0.9375

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