Question

Three bells ring at intervals of 36 seconds, 40 seconds and 48 seconds respectively . They start ringing together at a particular time . They will start ringing together after ________​

Answer 1

$\pink{SOLUTION}$

To find at which time will they ring together again, we need to find the LCM of 36,40 and 48

36 = 2×2×3×3

40 = 2×2×2×5

48 = 2×2×2×2×3

LCM - 2×2×2×2×3×5×3 = 720

=> They will ring together after 720s I. e, 12

minutes