A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:
(a) 20 days
(b) 22.5 days
(c) 25 days
(d) 30 days
Answers
Answered by
2
(b) 22.5 days is the answer.
Answered by
11
Work ratio ->A:B=3:1
hence time ratio,reverse of work ratio ->A:B=1:3
let x be day taken by B to complete work
hence x-60 days taken by A according to question
x-60/x=1/3
after solving this equation
answer will be x=90
and b=x-60=30
together they finishe work in 1/30+1/90
=2/45 = 22.5 days
hence time ratio,reverse of work ratio ->A:B=1:3
let x be day taken by B to complete work
hence x-60 days taken by A according to question
x-60/x=1/3
after solving this equation
answer will be x=90
and b=x-60=30
together they finishe work in 1/30+1/90
=2/45 = 22.5 days
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