LIC AAO Model Paper 7

Question : 50 of 160

Marks: +1, -0

What is the speed of the boat in still water ?
I. It takes 2 hours to cover distance between A and B downstreams.
II. It takes 4 hours to cover distance between A and B upstreams.

Validate

Solution:

Let the distance between A and B be z km.Again, let speed of boat in still water be x kmph and that of stream be y kmph.
∴ Rate downstream = (x + y) kmph
Rate upstream = (x-y) kmph From statement I,

z/{z+y}

= 2 ... (i)
From statement II

z/{x-y}

... (ii)

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