Ravi alone can do a work in 25 dyas while Syam alone can do it in 20 days. Ram started the work and joined by Syam after 10 days. How long did the work last?
Select the correct option.
A) 9 2/3 days.
B) 10 2/3 days.
C) 11 2/3 days.
D) 16 2/3 days.
E) 13 2/3 days.
Ram's 1 day work =1/25 Ram's 10 days work =10/25 =2/5 Remaing work =1-2/5 =3/5 Syam's 1 day work =1/20, Part of work finished by both =1/25+1/20 =9/100 Total work done by both = 100/9 days. Therefore the remaining 3/5 of work done by both =100/9*3/5 =6 2/3 days. Therefore the work lasted for ( 10+6 2/3 ) days =16 2/3 days. Answer : 16 2/3 days.
<result>D</result>
Ravi alone can do a work in 25 dyas while Syam alone can do it in 20 days. Ram started the work and joined by Syam after 10 days. How long did the work last?