Question

four bells ring at an interval of 45 min, 1 hour, 1hr 15min and 1hr 30mins. The bells ring together at 12 noon. Find the time at which all these four bells will again ring together​
explain step by step

Answer 1

Answer:

Clearly,we have to find LCM of 45min,60min , 75min , 90min.

Step-by-step explanation:

45 = 3^² *5

60 = 2^² *3 *5

75 = 3 * 5^²

90 = 2*3^²*5

TO FIND LCM WE TAKE ALL PRIMES WITH HIGHEST EXPONENTIAL POWER .

LCM= 2^² * 3^² * 5^²

= 4*9*25

=36*25

= 900