clock strikes once at 1:00, twice at 2:00 & so on. if it takes 6 sec to strikes at 5:00 & 12 sec to strike at 9:00 & also time to strike at 1:00 is negligible than find time spent to strike for 24 hours.

• gap between two strikes = 6/4= 3/2 = 1.5 secs
  
  At 24 hours or 12 'o clock, the clock strikes 12 times.
  there are 11 gaps.
  
  time spent = 11*1.5= 16.5 secs
• 13 years agoHelpfull: Yes(1) No(1)
• ans:198 sec
  it takes 6 sec to strikes at 5:00
  1st strike is negligible, we have 4 strikes in 6 sec.
  so for 1 strike 6/4 sec=3/2sec(same as in the case of 9oclock)
  total strikes in 24 hrs=2*(1+2+3+4+5+6+7+8+9+10+11)
  =2*66
  so required time =2*66*3/2
  =198sec
• 10 years agoHelpfull: Yes(0) No(0)
• 2*(1+2+3+4+5+6+7+8+9+10+11)
  =132
  4s=6sec
  8s=12sec
  s=3.2
  ans is
  132*1.5
  198sec
  
• 10 years agoHelpfull: Yes(0) No(0)