a is twice as good a workman b and together they finish..., Time & Work, General Mathematics

Question:A is twice as good a workman as B and together they finish a piece of work in 14 days. The  number of days taken by A alone to finish the work, is :

/47

+ AnswerB

+ Explanationsolution:
(A's 1 day's work) : (B's 1 day's work ) =`2 : 1`
`(A + B)`'s 1 day's  work = `1/14`.
Divide `1/14` in the ratio `2 : 1`.
`:.` A's 1 day's work = `(1/14 xx 2/3 )`
                                  = `1/21`.
Hence, A alone can finish the work in 21 days.

+ Report

Descriptive on Time & Work Ebook

Total Preview: 1160

Question:A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days taken by A alone to finish the work, is :

A 11

B 21

C 28

D 42

B