Ashifur August 8, 2023 - 16:27
Problem: A contractor employes 60 persons for doing a job in 80 days. After 20 days it was found that only one fifth of work was finished. How many more persons are to be employed to finish the job as per schedule?

View all: BANGLADESH BANK(AB) | WRITTEN QUESTION (MATH) SOLVE | 1992

Correct Answer: ans.20

Explanation:

Days rest = (80 – 20) = 60 days

Work rest =(I -$\frac{1}{5}$) =$\frac{4}{5}$

$\frac{1}{5}$ work takes 20 days by = 60 persons

$\frac{4}{5}$work takes 1 days by =$\frac{60\times 5\times 20 \times 4}{5}$ person

$\frac{4}{5}$work takes 60 days by =$\frac{60\times 5\times 20 \times 4}{5\times60}$=80 person

More persons are to be employed = (80 —60) = 20

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