Wednesday, October 14, 2009

Tom and Jerry Race

Tom and Jerry ran a 200 m race.
When Tom reached the finish line; Jerry was 10 m behind him.

So next time, Jerry made Tom stand 10 m behind the start line & both ran with same speed as in the earlier race.

Question: Who will win this time ?

[Post your answers with explanation in the comments]

1 comment:

mitanshu said...

Speed of Tom = St;
Speed of Jerry = Sj.

St*t1 = 200
Sj*t1 = 190

St/Sj = 20/19

In Race 2, jerry covers 200m in t2 time.
Sj * t2 = 200
=> [19/20]* St * t2 = 200
=> St * t2 = 200*20/19 = 210.53

So, by the time Jerry covers 200m, Tom has done more than 210m and hence Tom wins