A
Train 'A' is running at the speed of 50 km/h from Delhi to Ranchi. The
other train 'B' running at the speed of 38 km/h from Ranchi to Delhi at
Same time. When they both meet it is found the train 'A' covered 78 kms
more than train 'B'. Find the Distance between Delhi and Ranchi.
a) 564 b) 702 c) 585 d) 572 e) 608
Answers and Explanations are welcome in comments
D ?
ReplyDeleteSpeed of A more than B = 12 km/h
ReplyDeleteTotal Distance travel more by A = 78 km
Time travel by A = 78/12 => 6.5 hours
i.e Bot trains A & B Run for 6.5 hours
Now, Distance by A = 6.5*50 = 325
Distance by B = 6.5*38 = 247
Total Distance = A+B + 325+247 = 572
Correct Answer is 572 minutes
ReplyDeleteExplanation : Just do a simple step to solve this
Speed of Train A is 50 km/h means it covers 50 kilometers in an hour
Speed of Train B is 38 km/h means it covers 38 kilometers in an hour
so Train A covers 12 kilometer more in an hour
Now we know when both meet each other train A covers 78 km more (in 1 hour 12 more overall 78 that means they will meet after 78/12 hours)
So they both travelled 78/12 hours
D=(50*78/12)+(38*78/12)
or (88*78/12) = 572