Gita (5 m/s, clockwise) and Hema (4 m/s, anticlockwise) start together from a point of a 900 m track. At their first meeting Hema turns round and runs clockwise at the same speed. After how many seconds from the start do they meet for the second time?

Question

Accepted Answer

1000 s. First meeting after 900/9=100 s. Now both run clockwise from the same spot; Gita must gain a whole lap at 5-4=1 m/s: 900 s more. Total =1000 s. (200 s assumes they still run towards each other.)

Gita (5 m/s, clockwise) and Hema (4 m/s, anticlockwise) start together from a point of a 900 m track. At their first meeting Hema turns round and runs clockwise at the same speed. After how many seconds from the start do they meet for the second time?

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