Bird is flying 120 kmphr between B to R Two trains at B to R at 60 kmph The distance traveled by the bird b4 it is killed?

Answer 1

We understand what you're trying to say, even though you've thoroughly botched it,

because we've heard it before.

Unless we're mistaken, the trains are steaming toward each other on the same track,

each steaming at a rate of 60 kph, and at the instant the trains are 60 km apart, the

bird leaves the nose of one, flies directly to the other at a rate of 120 kph, then turns

around and returns to the first, and continues back and forth across the ever-dwindling

divide until it is crushed in the head-on collision, and the question is how far it flies in total.

Watch closely. Nothing up our sleeve.

Each train steams at 60 kph, so the distance between them closes at the rate of 120 kph.

They are 60 km apart when our saga begins, so the crash occurs after (60/120) = 1/2 hour.

The bird flies at 120 kph, so logs 60 km in the 1/2 hour before it expires in the fiery collision.

There's an amusing story about this problem. Two highly eminent mathemamaticians were talking and one mentioned this question, The other replied promptly with the correct answer. "Very impressive" joked the first. "Most people would have worked out how far the bird travelled on each leg and then summed the series, which of course is not the quickest way to do it." The other said, "But that's what I did!".

Answer 2

170'