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X, Y, Z start at the same time in the same direction to run around a circular stadium. X comple

 

X, Y, Z start at the same time in the same direction to run around a circular stadium. X completes a round in 63 seconds, Y in 105 seconds and Z in 210 seconds. If they start at the same time, then at what time will they meet again at the starting point?

 

  • Option 1)

     

    9 \: min \: 9 \: seconds

     

  • Option 2)

     

    10 \: min\: 30\: seconds

     

  • Option 3)

     

    10\: min \: 6 \: seconds

     

  • Option 4)

     

    8 \: min \: 4 \: seconds

     

  • Option 5)

     

    -

     

Answers (1)
Views

X = 63

Y = 105

Z = 210

LCM of X,Y & Z = 630 Seconds or 10 min & 30 seconds

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