A printer started its work at 8.15 a.m and ended its work at 9.20 p.m. It was interrupted twice for the time duration of 42 min. It can print 100 instructions per hour. Approximate how many instructions it can print?

• Time duration from 8.15am to 9.20pm = 13 hours 5 min = 785 minutes
  stoppage for 2*42 min= 84 min
  effective running time = 701 min
  in 60 min 100 instructions are printed
  in 1 min = 100/60 instructions
  in 701 min , we have 701*100/ 60 = 1168.33 instructions
• 11 years agoHelpfull: Yes(122) No(6)
• approx 1238
• 13 years agoHelpfull: Yes(17) No(8)
• it starts at 8:15a.m & ends at 9:20p.m. so the time it has worked is---13hrs 5min
  and it was interrupted twice i.e 42min.
  so,(13hrs5min-42min)=13hrs 03min.
  for one hour it prints 100 instructions
  so,for 13hrs=1300 instr & 03min=5 instr
  total instr=1300+5=1305approx.
• 13 years agoHelpfull: Yes(9) No(39)
• Time duration from 8.15am to 9.20pm = 13 hours 5 min = 785 minutes
  stoppage for 2*42 min= 84 min
  effective running time = 701 min
  in 60 min 100 instructions are printed
  in 1 min = 100/60 instructions
  in 701 min , we have 701*100/ 60 = 1168.33 instructions
• 9 years agoHelpfull: Yes(8) No(0)
• i think 1208
• 13 years agoHelpfull: Yes(1) No(8)
• 1168.37 instructions it ccan print
• 9 years agoHelpfull: Yes(1) No(0)
• 1358.33 instructions
• 10 years agoHelpfull: Yes(0) No(1)
• 8.15 am to 9.20 pm = 13.0833 hrs
  interrupted time duration = 1.4 hours
  so, operational time duration= (13.0833-1.4) = 11.68 hours
  ~= 12 hours
  Thus, 1200 instructions approx printed in 12 hours(Ans)
• 9 years agoHelpfull: Yes(0) No(0)
• 21:20-8:15 == 13:05 = 665
  
  60 =100
  665 = 100*665/60 = 1100
• 9 years agoHelpfull: Yes(0) No(1)
• 818 it can print in 8:11 hrs
• 8 years agoHelpfull: Yes(0) No(1)
• 1140
  Total working min=13hr5min=780+5 min =785min
  interrupted time =42min
  Proper working time =743 min
  
  Instructions per hour(60 min)= 100
  Intstrucitons per 743 min = (100/60)*743=1240
• 7 years agoHelpfull: Yes(0) No(0)
• lets divide the time in slot of 12 hr. so,from 8.15 to 12 time will be 3.45 hr and from 12.00 to 9.20pm will be 9.20hr so total time = 3.45 + 9.20 = 13.05 hr but it was distrubted twice with duration of 42 ,so total disturbance= 1.24 hr
  so total working = 13.05 - 1.24 = 11.41
  as in 1 hr =100
  so fro 11 hr =1100 and fro 41 min 68.33
  total print = 1100+68.33 = 1168.33
• 6 years agoHelpfull: Yes(0) No(0)