subash can copy 50 pages in 10 hrs.subash and prakash together can copy 300 pages in 40 hours.in how much time prakash can copy 30 pages.

• subhas 's 1 hr copy page=50/10=5 page
  (subhas+prakash)'s 1 hr copy page=300/40=7.5 page
  from above prakash's 1 hr copy page= 2.5 page
  
  so time taken in 30 page's copy =(30/2.5)=12 hrs
• 10 years agoHelpfull: Yes(32) No(0)
• both can work in 300 pages = 40
  work of both = 1/40
  subhas can copy 300 pages = 60
  work of subhash = 1/60
  prakash work in 300 pagess = 1/40 - 1/60
  => 1/120
  so 30 will be copied = (120/300)*30= 12 hr
• 10 years agoHelpfull: Yes(13) No(1)
• That means subhash copied 200 pages in 40 hrs nd prakash copied 100 pages in 40 hours so prakashcan copy 30 pages in 40*30/100=12 hrs
• 10 years agoHelpfull: Yes(2) No(0)
• 12 hrs
  
  40*5+40*(2.5)=300
  x*2.5=30
  x=12
• 10 years agoHelpfull: Yes(1) No(0)
• healready given
• 10 years agoHelpfull: Yes(0) No(0)