• No products in the cart.

# Men and Job (Tomato 2)

If m men can do a job in d days, then the number of days in which m+r men can do the job is
(A) d+r; (B) $$\frac{d}{m} (m+r)$$ ; (C) $$\dfrac {d}{m+r}$$ ; (D) $$\dfrac {md}{m+r}$$;

Discussion:

If m men can do a job in d days,
Then m men does $$\frac {1}{d}$$ job in 1 day
Then 1 man does $$\frac {1}{md}$$ job in 1 day
Then m+r men does $$\frac {m+r}{md}$$ job in 1 day
Then m+r men does 1 job $$\frac {md}{m+r}$$ days.

Hence answer is $$\dfrac {md}{m+r}$$ days (D)

## Chatuspathi:

• What is this topic: Arithmetic
• What are some of the associated concepts: Unitary Method
• Where can learn these topics: Cheenta I.S.I. & C.M.I. course, discusses these topics in the ‘Arithmetic’ module.
• Book Suggestions: Arithmetic by K.C. Nag
April 15, 2016