1. 

How many workers are required for completing the construction work in 10 days?

I. 

20% of the work can be completed by 8 workers in 8 days.

II. 

20 workers can complete the work in 16 days.

 III. 

One-eighth of the work can be completed by 8 workers in 5 days.

A. I only
B. II and III only
C. III only
D. I and III only
E. Any one of the three

Answer: Option E

Explanation:

I (20/100) work can be completed by (8 x 8) workers in 1 day.

⇒ Whole work can be completed by (8 x 8 x 5) workers in 1 day.

    = ( 8 x 8 x 5 /10 ) workers in 10 days = 32 workers in 10 days.


II. (20 x 16) workers can finish it in 1 day.

⇒ (20 x 16 /10) workers can finish it in 10 days.

⇒ 32 workers can finish it in 10 days.


III. 1/8 work can be completed by (8 x 5) workers in 1 day.

⇒ Whole work can be completed by (8 x 5 x 8) workers in 1 day.

( 8 x 5 x 8 / 10 ) workers in 10 days = 32 workers in 10 days.

∴ Any one of the three gives the answer.

∴ Correct answer is (E).