$$2021\div (21+22)=47$$. 
Rick and Roy each stands at different ends of a straight road that is $$2021$$m long. They run toward each other. Rick\textquotesingle s speed is $$21\text{m/s}$$ and Roy\textquotesingle s speed is $$22\text{m/s}$$. They will meet in~\uline{~~~~~~~~~~}~seconds. 
Options:
1) $$35$$ 
2) $$4$$ 
3) $$47$$ 
4) $$50$$ 