Shanti's school normally FINISHES AT 4 PM. her mom drives from home to pick her up, reaching the school exactly at 4 pm. one day, a half holiday is announced and the School finishes for the day at 1 pm. Rather than sitting and Waiting , Shanti decides to start walking towards home. Her mother meets her along the way and as a result they reach home an hour earlier than normal. what is the ratio of the Shanti's walking speed to her mother's driving Speed?  Answers
A) 1:2  B) 1:3  C) 1:4  D) 1:5  E) 1:6
together they save 1hr, i.e, in a one way trip, they would save half Hour each.   therefore, instead of meeting Shanti at 4pm in the school, her mother meets her at 3.30pm(half an hour earlier, to &amp; fro will save 1 hour)   Therefore from the meeting point, to reach the school, the car would take .5 hrs   However, Shanti took 2.5 hrs(3.30-1) to reach the meeting point   Therefore, .5 Times Mom's speed = 2.5 Times Shanti's speed-----&gt;(distance=time x speed, since distance is same, equating the product of time and speed for both the cases)   therefore, ratio of the speeds is 1:5   ANSWER:1:5
<result>D</result>
Shanti's school normally FINISHES AT 4 PM. her mom drives from home to pick her up, reaching the school exactly at 4 pm. one day, a half holiday is announced and the School finishes for the day at 1 pm. Rather than sitting and Waiting , Shanti decides to start walking towards home. Her mother meets her along the way and as a result they reach home an hour earlier than normal. what is the ratio of the Shanti's walking speed to her mother's driving Speed?