Bus Ho Gaya

Vatsal and Dipen met at Vikrant Circle after a long time. Vatsal stays at Chembur and Dipen at Kurla. Both of them commute by bus. They reached the bus stop, and got to know that both their buses had left just then (at the same time) for the respective destinations. Neither wanted to leave the other alone at the bus stop. They came to know that a bus arrives every x min for Chembur and every y min