Rama and Hari can together finish a piece of work in 15 days. Rama works twice as fast as Hari, then Hari alone can finish work in :
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 45 days
Efficiency × Time = total work
The ratio of doing work of Rama and Hari is 2 : 1
let their efficiency be 2x and x
Total work = (2x + x) × 15 = 45x
Time taken by Hari = 45x/x = 45 days