Question 1134199
{{{1/3+1/5=1/x}}}

{{{(5+3)/(3*5)=1/x}}}

{{{8/15=1/x}}}...... cross multiply

{{{8X=15}}}

{{{x=15/8}}}

{{{x=1.875}}} hours or {{{x=1h}}}{{{53min}}} working together