Question

Car X started from M at 6.00am and went towards N,Car Y started from M at 7.00am in the same direction as X it overtook car X after covering 40% of the distance MN both cars then continued travelling towards N after reaching N Car Y turned back and met X after covering 12% of distance NM .Find the time taken by car Y to cover the distance MN

Answer 1

I don't know the ans