# A and B walk around a circular park. They start at 8 a.m. from the same point in the opposite directions...

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A and B walk around a circular park. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other after 8.00 a.m. and before 9.30. a.m. ?

posted Aug 8, 2018
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## 1 Answer

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7 times

As they go on opposite direction, their speed will add up: 2+3=5 rounds per hour or 1 round every 12 mins. In 1 hr 30 min they make 90 min / 12 min=7 full rounds, so they will cross 7 times

answer Aug 8, 2018

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