Answer
1- Total distance traveled by A and B at the time of the meeting is Half circle circumference = 180 * π / 2
2- distance traveled by A is 2 times more distance traveled by B because A riding at twice the speed of B
3 - then if distance traveled by B is x then distance traveled by B is 2x
4 - then Total distance traveled by A and B is 3x
5 -
[tex]3x = 180* \pi / 2\\x = 30 * \pi[/tex]
Step-by-step explanation: