Relative speed = $68 - 8 = 60$ km/h $= 60 imes (5/18) = 50/3$ m/s. Time $= Distance / Speed = 150 / (50/3) = 9$ seconds.
सापेक्ष गति = $68 - 8 = 60$ किमी/घंटा $= 60 imes (5/18) = 50/3$ मीटर/सेकंड। समय $= दूरी / गति = 150 / (50/3) = 9$ सेकंड।