I need to find the unit rate for all three of these, if anyone could help me that’d be great! I’ll even mark as brainliest!!

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Ineed with math stuff it involves graphs