navodya vidyalaya Exam Numerical Ability Boats and Streams

A BOAT COVER 32 KM UPSTREAM AND 36 KM DOWNSTREAM IN 7 HOURS .ALSO ,IT COVERS 40 KM UPSTREAM AND 48 KM DOWNSTREAM IN 9 HOURS .THE RATIO OF SPEED OF BOAT IN STILL WATER AND SPEED OF THE STREAM IS ?

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navodya vidyalaya Other Question

X AND Y HAVE CERTAIN NUMBER OF ORANGES .X SAYS TO Y ,"IF YOU GIVE ME 10 OF YOUR ORANGES ,I WILL HAVE THE SAME NUMBER OF ORANGES AS LEFT WITH YOU".Y REPLIES,"IF YOU GIVE ME 10 OF YOUR ORANGES ,I WILL HAVE THE SAME NUMBER OF ORANGES AS LEFT WITH YOU ".THE NUMBER OF ORANGES WITH Y IS.