Question

Three bells ring at intervals of 45 seconds,30 seconds and 25 seconds respectively. All the three bells ring together at 6 am in the morning. After how many seconds will all these bells again ring together?

Answer 1

Answer:

C.Consider the given box ` MnO_(4)^(-) Ni^(2+) Pb^(2+) CrO_(4)^(-) CO_(3)^(2-) Na^(+) Cr_(2)O_(7)^(2-)` (i) Identify the colourless anion. (ii) Identify the colourless anion. (iii) Identify the green coloured cation. (iii) Identify the green coloured cation.

Answer 2

Answer:

LCM OF THREE NUMBER=TIME TAJEN BY THEM TO RING AGAIN

LCM OF 45,25 AND 30 IS 450,so after 6 am they wil ring after 450 second or 6:07.5 am or 6 hours 7 minute and 30 seconds