Question
R and S start walking towards each other at 10 am at speeds of 3km/hr and 4km/hr respectively. They were initially 17.5km apart at what time do they meet?
Answer: Option B
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Suppose they meet after x hours , then 3x +4x = 17.5
=> 7x = 17.5
=> X = 2.5hours
So they meet at 12: 30 p.m
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