Answer:
Step-by-step explanation:
According to the question,
60 degrees 50 minutes 40 seconds subtract 30 degree 40 minutes 50 seconds.
⇒[tex]60^{{\circ}}50^{'}40^{''}-30^{{\circ}}40^{'}50^{''}[/tex]
⇒[tex]60+(50{\times}\frac{1}{60})+(40{\times}\frac{1}{60}{\times}\frac{1}{60})-(30+(40{\times}\frac{1}{60})+(50{\times}\frac{1}{60}{\times}\frac{1}{60}))[/tex]
⇒[tex]60+\frac{5}{6}+\frac{1}{90}-(30+\frac{2}{3}+\frac{1}{72})[/tex]
⇒[tex]60+\frac{5}{6}+\frac{1}{90}-30-\frac{2}{3}-\frac{1}{72}[/tex]
⇒[tex]60+0.84+0.02-30-0.67-0.02[/tex]
⇒[tex]60.86-30-0.67-0.02[/tex]
⇒[tex]30.17..[/tex] degrees.