A and B can do a job together in 7 days. A is 13/4 times as efficient as B. The same job can be done by A alone in

Let A's and B's 1 day's work be 7x and 4x respectively.

(A's 1 day's work) : (B's 1 day's work) = 7/4 : 1 = 7 : 4.

Then, 7x + 4x = 1/7 => 11x = 1/7 => x = 1/77 .

Therefore A's 1 day's work = ( 1/77 x 7 ) = 1/11 = 11 days

A and B can do a job together in 7 days. A is 13/4 times as efficie

1.	A and B can do a job together in 7 days. A is 13/4 times as efficient as B. The same job can be done by A alone in
A.	(A's 1 day's work) : (B's 1 day's work) = 7/4 : 1 = 7 : 4.
B.	Let A's and B's 1 day's work be 7x and 4x respectively.
C.	Then, 7x + 4x = 1/7 => 11x = 1/7 => x = 1/77 .
D.	Therefore A's 1 day's work = ( 1/77 x 7 ) = 1/11 = 11 days
Answer» B. Let A's and B's 1 day's work be 7x and 4x respectively.

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A and B can do a job together in 7 days. A is 13/4 times as efficient as B. The same job can be done by A alone in

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