Correct Answer - Option 3 : 30 days
Given:
Efficiency Ratio of Ram & Shyam = 2: 1
They together can finish the whole task in 10 days
Concept used:
Total work = Efficiency × Number of days
Calculation:
Let the efficiency of Shyam be x
⇒ The efficiency of Ram = 2x
⇒ Total efficiency of Ram and Shyam = x + 2x = 3x
⇒ Total work = (3x) × 10 = 30 x
Shyam can complete the whole task = (30x/x) = 30 days
∴ Shyam alone can complete the whole task in 30 days