Question

270 meter/ 180 seconds​

Answer 1

Answer:

Total distance = 180 + 270 = 450m  Relative speed = 60 + x (say) kmph = (60+x)× (5/18) m/s  Time taken = (450/10.8) × (18/5) = 60 + x  ⇒ 150 = 60 + x  or x = 150 – 60  = 90 km/h