Two boys begin together to write out a booklet containing 535 lines. The first boy starts with the first line, writing at the rate of 100 lines an hour; and the second starts with the last line then writes line 534 and so on, backward proceeding at the rate of 50 lines an hour. At what line will they meet?

• X(100+50)=534,x=3.56 hr
  Since they will meet after x hr of starting
  Consider concept of relative velocity ,motion is in oposite direction
• 9 years agoHelpfull: Yes(0) No(1)
• The easiest way to solve this and other similar questions is to use relative speed concept of Time & Distance type problems.
  Let the distance = 535 lines.
  relative speed = 100+50 = 150 lph.
  so both meet at = 535/150 = 3.566 hrs
  
  So, in 3.566 hrs, first boy would have reached at line number = 3.566*100 = 356.6 .
  = this means the first boy would be writing 357th line.
  
• 8 years agoHelpfull: Yes(0) No(0)