Correct Answer - Option 2 : 19 days
Given:
210 units of work completed in 7 days
Calculation:
As, 210 units of work is completed in 7 days.
1 unit of work is done in (7 ÷ 210) days
∴ 570 units of work is done in = (7 ÷ 210) × 570
= \( {570 \ \over 30}\)
= 19 days
∴ The number of days taken by man to complete 570 units of work is 19 days.
