Question

30. Three bells rings at intervals of 12 min, 14 min and 18 min, respectively. They started
ringing simultaneously at 7:00 am. What will be the next time when they all ring simultaneously?
(a) 11:12 am (b) 10:12 am
(C) 12:12 pm (d) 12:00 pm​

Answer 1

Three bells 7,10,14 minutes

They will be ringing after L.C.M of (7,10,14) minutes

Factorise 7,10,14

7=7

10=5×2

14=7×2

⇒ L.C.M (7,10,14)=7×2×5=70

∴ They will be ringing together after 70 minutes.

Answer 2

Answer:

l o l lol l o l