Question 1157210
Both travel time sum to 6 hours.

{{{d/132+d/231=6}}}
Solve for d.


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{{{d/(11*12)+d/(11*21)=6}}}

{{{d/(11*2*2*3)+d/(11*3*7)=6}}}

{{{(7/7)(d/(11*2*2*3))+(4/4)(d/(11*3*7))=6}}}

{{{7d/(11*4*3*7)+4d/(11*4*3*7)=6}}}

{{{11d/(11*4*3*7)=6}}}

{{{d/(84)=6}}}

{{{d=84*6}}}

{{{highlight(d=504)}}}