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12 months ago
12 months ago
Distance b/w A and B = 90 Miles
(i)Speed of train (A to B) = 60 Miles/Hr
Speed of bird (B to A) = 90 Miles/Hr
Relative Speed = 60 + 90 = 150 Miles/Hr (As they are moving in opposite direction)
Time to cover the distance (90 miles) = 90/150 = 3/5 hr = 36 min
Distance covered by bird when it moves towards A = 90 x 3/5 = 54 miles
Total distance covered by bird = 2 x 54 = 108 miles (As bird takes u turn so distance covered will be double)
(ii) Same as first case try on your own
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