Clocks A, B and C strike every hour. B slows down now and takes 2 minutes longer than A per hour while C has become faster and takes 2 minutes less that A per hour. If they strike together at 12 midnight when will they strike again?

a. 10 a.m
b. 11 a.m
c. 10 a.m
d. 11 p.m

• Clock A strikes every 60 minutes.
  
  Clock B strikes every 62 minutes.
  Clock C strikes every 59 minutes.
  
  The LCM of 60, 62, and 59 is: .109,740 minutes
  
  i.e,76 days 5 hours
  
  so,they strike at 5 am.on 77th day
• 10 years agoHelpfull: Yes(0) No(2)
• C takes 58 mins, B takes 62 mins ando A takes 60 mins for 1 hr. Hence Lcm of 58,60,62 is 53940 mins. That equals to 37 days and 11 hrs. Hence answer is b 11 am.
• 9 years agoHelpfull: Yes(0) No(0)
• the answer is 11 am
  .A strikes every hour =60 min
  .B takes 2 min longer than A =62 min
  .C takes 2min less than A =58 min
  
  we have to do lcm for 60,62,58
  
  by doing lcm we will get 899 hours
  
  we have to add this 899 hours to 12mid night to know when it will strike again
  so...
  899 hours=37 days and 11 hours
  by adding this to 12 at midnight we will get 11 am
• 1 Month agoHelpfull: Yes(0) No(0)