**Michael Phelps Maths Problem - 13 February**

Michael Phelps , the famous swimmer can swim downstream in a lake in exact 40 minutes (with the lake current helping time).

He can swim upstream in a lake in exact 60 minutes (against the lake current).

The length of lake is 2 kilometers.

How long Michael Phelps can cover distance of one side at a still lake (no current).

**For Solution :**Click Here

48 minutes

ReplyDelete48 minutes.

ReplyDeleteMichael Phelps speed = X km/minute

Lake current speed = Y km/minute

2/(X+Y) = 40

2/(X-Y) = 60

Solving the simultaneous equations gives X = 1/24

Therefore, to cover 2km will take 2/X = 48 minutes

-AO

48 mintz..!! by usng the eqnz,(x+y)*40 = (x-y)*60 +2!!!

ReplyDelete