Question

21. Two trains start towards each other at same time with speeds 50kmph and 60kmph, a bird perched first train and starting from first train it went to second train and came back to first train it went back to second train. The distance between trains was 220km and speed of bird was 80kmph what is the total distance travelled by bird? (a) 160 km (b) 180 km (c) 140 km (d) None of these​

Answer 1

Answer:

Step-by-step explanation:

Let the two trains meet after x hours. Then, 60x−50x=120⇒10x=120⇒x=12hrs

Distance AB = (Dist. covered by slower train) + (Dist. covered by faster train)

                  =[(50×12)+(60×12)]km

                  =600km+720km=1320km