Question

Two trains A and B start from Howrah and Patna towards Patna and Howrah respectively at the same time. After passing each other, they take 4h 48 min and 3h 20 min to reach Patna and Howrah, respectively. If the train from Howrah is moving at 45 km/h, then the speed of the other train isA). 60 km/h
B). 45 km/h
C). 35 km/h.
D). 54 km/h​

Answer 1

Answer:

Given, a=45 km/h, y=?, t1 = 4h 48 min and t2 = 3 h 20 min

Using y = at1t2−−√=454h and 48 min3h and 20 min−−−−−−−−−√

= 45245h103h−−−√

= 4524×35×10−−−−√

= 45×1.44−−−−√=45×12 = 54 km/h