There are 15 poles in a straight line each equally placed from each other. The time taken to reach the 10th pole after a man startswalking from 1st pole is 10 seconds. What is the time required to reach 15th pole.

Let any two poles be placed x units apart.
Distance between 1st and 10th pole=(10-1)x=9x units.
Distance between 1st and 15th pole=(15-1)x=14x units.
If time taken to cover 9x units is 10 seconds,
then time taken to cover 14x units is.....
(10*14x)/9x = 15.55 seconds.

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manohar

  • Apr 13th, 2006
 

The time taken to cross the poles from 1st pole to 10th pole(i.e, 9 poles ) is 10 sec.

Then the time taken to cross 1 pole is 10/9 sec.

Therefore the time taken to cross the poles from 1st pole to 15th pole(i.e, 14 poles) is (10/9)*14=15.55 sec.

 

 

B.V.Manohar

K.E.C

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