Three bells ring at intervals of 15, 20 and 30 minutes respectively. If they all ring at 11.00 a.m. together, at what lime will ‘ they next ring together?
A. 11.30 a.m.
B. 12 noon
C. 12.30 p.m.
D. 1.00 p.m.
Answer:B
Three bells ring at intervals of 15, 20 and 30 minutes respectively. If they all ring at 11.00 a.m. together, at what lime will ‘ they next ring together?
A. 11.30 a.m. B. 12 noon C. 12.30 p.m. D. 1.00 p.m.