Ram, Shyam and Mukesh can reap a field in 63÷4 days ;Shyam, Mukesh and Chandu in 14 days ;Mukesh, Chandu and Ram in 18 days ;Chandu, Ram and Shyam in 21 days. In how much time can all of them together reap the field.
Answers
Answered by
8
let ram is A,shyam is B,Mukesh is C,chandu is Di
(A+B+C)'s can reap field in days=63/4
(B+C+D)'s can reap field in days=14
(C+D+A)'s can reap field in days=18
(D+A+B)'s can reap field in days=21
formula used in
1/(A+B+C+D)=1/(A+B+C)+1/(B+C+D)+1/(C+D+A)+1/(D+A+B)
=1/(63/4)+1/14+1/18+1/21
4/63+1/14+1/18+1/21
=(12+9+7+6)/126
=34/126
hence A,B,C,D all of them reap field in time=4 days
(A+B+C)'s can reap field in days=63/4
(B+C+D)'s can reap field in days=14
(C+D+A)'s can reap field in days=18
(D+A+B)'s can reap field in days=21
formula used in
1/(A+B+C+D)=1/(A+B+C)+1/(B+C+D)+1/(C+D+A)+1/(D+A+B)
=1/(63/4)+1/14+1/18+1/21
4/63+1/14+1/18+1/21
=(12+9+7+6)/126
=34/126
hence A,B,C,D all of them reap field in time=4 days
Answered by
1
Answer:
Step-by-step explanation:
Similar questions