10 Sastry st art s working o n a jo b and wo rks on it for 12 day s and co mpletes 40% of the
work. To help him co mplet e the work, he employs R avi and t ogether they work for
another 12 day s and the work gets completed. How muc h more efficient is Sastry t han
Ravi?
(a) 50% (b) 200% (c) 60% (d) 100%

• S do 40% in 12 days
  R+S do 60% in 12 Days
  as S do 40% therefore R will do 20%
  So S:R=2:1
  therefore S is 100% efficient
• 12 years agoHelpfull: Yes(9) No(1)
• 100%
  
  Sastry can complete the work in 30 days
  whereas Ravi can complete work in 60 days.
  
  So Sastry is 2 times efficient as compared to Ravi
  so Sastry is 100% more efficient than Ravi.
• 12 years agoHelpfull: Yes(7) No(5)
• d)100%
  Sastry's 12 days work=40%,So Sastry's 1 day work in %=40/12=10/3
  Remaining work=60%, which is completed in another 12 days
  If Ravi's 1 day work=1/R, then 12(10/3 + 1/R)=60 -> 1/R=5/3
  The ratio Sastry/Ravi=(1/S)/(1/R)=(10/3)/(5/3)=2
  This means Sastry is double or 100% more efficient than Ravi
  
• 12 years agoHelpfull: Yes(3) No(1)
• shastri takes 30 days
  ravi takes 60 days
  
  shastri/ravi=1/2
  
  2*shastri=ravi.
  
  if ravi efficiency is 100%, shastri efficiency is 200%
• 12 years agoHelpfull: Yes(1) No(3)
• tell me if am wrong here after calculating i got sastry is 25 and ravi is 10 approx so 15*100/25 = 60 percent
• 12 years agoHelpfull: Yes(0) No(8)