Question

Rama and Hari can together finish a piece of work in 15 day. Rama works twice as fast as Hari, then Hari alone can finish work in :

• A. 45 days
• B. 30 days
• C. 25 days
• D. 20 days

Answer 1

Answer:

A. 45 days

Solution:

GIVEN:

Rama and Hari  together can finish a piece of work in 15 days

Rama works twice as fast as Hari

FORMULA USED:

 Work = Efficiency × No. of days

CALCULATION:

Rama works twice as fast as Hari

⇒ The efficiency of Rama: Hari = 2:1

⇒ Total Work = Efficiency of (Rama + Hari) × Total number of days to finish the work

⇒ 3 × 15 = 45

⇒ No. of days required to finish whole work by Hari alone = Total work/Efficiency

⇒ 45/1 = 45

∴ Hari can finish the whole work alone in 45 Days

Alternate Method: