Question

Rohan can do a piece of work in 16 days. Rohit is twice as efficient as Rohan. In how many days will Rohit complete the work?
1. 6 days
2. 4 days
3. 8 days
4. 2 days

Answer 1

Correct Answer - Option 3 : 8 days

Given:

Rohan can do a piece of work = 16 days

The efficiency of Rohit = twice as Rohan

Calculation:

Let, efficiency of Rohan = x/day

∴ Efficiency of Rohit = 2x/day

Let, Rohit can complete the work in = y days

According to the question,

⇒ 16x = 2xy

⇒ 2y = 16

⇒ y = 8

∴Rohit will complete the work in = 8 days