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Q

   On Ashok Marg three consecutive traffic lights change after 36, 42 and 72 seconds

 

   On Ashok Marg three consecutive traffic lights change after 36, 42 and 72 seconds respectively. If the lights are first switched on at 9:00 A.M. sharp, at what time will they change simultaneously?

 

  • Option 1)

     

    9 : 08 : 04

     

  • Option 2)

     

    9 : 08 : 24

     

  • Option 3)

     

    9 : 08 : 44

     

  • Option 4)

     

    None\: of\: these

     

  • Option 5)

     

    -

     

Answers (1)
Views

LCM of 36, 42, 72 = 504 seconds or 8 min 24 seconds

Required Time = 9:00 + 8 min 24 seconds

                           = 9: 08: 24

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