City X and city Y are connected to a str...

City X and city Y are connected to a straight road A and B start moving simultaneously toward each other after travelling some distance B takes a `60^@` turn to his left two hours later after B turns A takes a `60^@` turn to his right A travels 60 km after running before he meets B.A and B meet 10 hours after they start their journey A and B together travel 200 km before turning and they arrive at the meeting point simultaneously. What is B's speed?

(A) 10km/h

(B) 12.5km/h

(D) 15km/h

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