LIC AAO 12 May 2013 Paper

Question : 44 of 160

Marks: +1, -0

The circumference of a park is 750 m. A and B start walking from the same point in the same direction at 6.75 kmph and 4.75 kmph. In what time will they meet each other again?

3 hours
2.5 hours
3.5 hours
4 hours
None of these

Validate

Solution:

Time taken by A in completing one revolution
=

{750}/{{6.75×5}/{18}}

sec
=

({750×18}/{6.75×5})

sec
Time taken by B
=

({750×18}/{4.75×5})

sec
Required time =

{\LCM \of \numerators}/{\HCF \of \denominators}

{750×1800}/{125}

= 1800 × 6 seconds
=

{1800×6}/{3600}

= 3 hours

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