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 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 : Correct Answer 22.5 days

Let, A can finish the job in x days B can finish the job in 3x days. According to the question 3x - x = 60 2x = 60 x = 30 days B can finish the job in 3 × 30 or, 90 days In 1 day A can finish 1/30 th job In 1 day B can finish 1/90 th job In 1 day both A and B can finish 1/30 + 1/90 th job = 3 + 1 /90 = 2/45 th both A and B can finish the job in 1/2/45 = 22.5 days.
Bissoy MCQ

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