A and B start from the same point and in the same direction at 7 a.m. to walk around a rectangular field 400 m x 300 m. A and B walk at the rate of 3 km/hr and 2.5 km/hr respectively. How many times shall they cross each other if they continue to walk til

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Q: 104 (IAS/2004)
A and B start from the same point and in the same direction at 7 a.m. to walk around a rectangular field 400 m x 300 m. A and B walk at the rate of 3 km/hr and
2.5 km/hr respectively. How many times shall they cross each other if they continue to walk till 12 : 30 p.m?
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question_subject: 

Maths

question_exam: 

IAS

stats: 

0,6,15,5,6,4,6

keywords: 

{'rectangular field': [0, 0, 1, 0], 'twice': [3, 0, 1, 0], 'thrice': [3, 1, 3, 1], 'km': [0, 0, 2, 1], 'rate': [2, 3, 13, 20]}