Question

Three bells toll at intervals of 12 mins, 15 mins and 18 mins respectively , if they start tolling together after what time they will next toll together (a) 3 hrs (b) 90 mins (c) 900 mins (d) 180 hrs

Answer 1

Step-by-step explanation:

As given the bels toll at intervals of 12 min, 15 min and 18 min respectively. meet at the time when their tolling interval coincides i.e. The L.C.M of 12 15 and 18. 2*2*3*3*5 = 180 minutes. Thus, they will toll together after 180 minutes of starting i.e. after 3 hours.

Answer 2

Answer:

answer is d

Step-by-step explanation:

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