[tex]\begin{gathered} the\text{ equation for clown A,} \\ A=100+11h \\ \text{the equation for clown B} \\ B=150+8h \\ \text{Now, equate both the equation to get the hours,} \\ 100+11h=150+8h \\ 11h-8h=150-100 \\ 3h=50 \\ h=16.67\text{ hours} \end{gathered}[/tex]