Question

Bob is thrice as good a workmen as rita.Together,they can do a piece of work in merely 15 days.How many days will rita take to finish the work,working alone

Answer 1

Answer: 60 days

Step-by-step explanation:

Together Bob and Rita means 4 Rita.

So 4 Rita do a work in 15 days,

So 1 Rita will do it in 15*4=60 days

Answer 2

According the question, Bob works thrice as good as Rita.

∴ Bob  = 3 × Rita.

In question it is given that (Bob + Rita) they together can complete a work in 15 days.

∴ Bob  + Rita = complete a work in 15 days

( 3 × Rita + Rita )= can complete a work in 15 days

4 Rita can complete a work in 15 days

1 Rita can complete a work in = (15 ×4 )days= 60 days.

Hence working alone Rita can complete the work in 60days.

Ans :- Working alone Rita can complete the work in 60days.

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