NIFT PG 2009 Question Paper with solutions

Question : 150 of 150

Marks: +1, -0

Swapnil, Aakash and Vinay begin to jog around a circular stadium. They complete their revolution in 36 seconds, 48 seconds and 42 seconds respectively. After how many second will they be together at the starting point?

504 seconds
950 seconds
1008 seconds
470 seconds

Validate

Solution:

Here,

36=2×2×3×3

48=2×2×2×2×3

42=2×3×7

Thus, LCM of 36, 48, 42

=2×2×2×2×3×3×7

=1008

Hence, they will meet together at starting point after 1008 seconds.

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