Question

Ramesh and suresh can do a piece of work in 20 days and 12 days respectively. Ramesh started the work alone and then after 4 days, suresh joined him till the completion of the work. How long did the work last?

Answer 1

Answer:

9-3/5

Step-by-step explanation:

Ramesh ka ek din ka kaam=1/20

Suresh ka ek din ka kaam=1/12

Ramesh ka 4 din ka kaam=4/20=1/5

bacha hua kary =4/5

mana yah kary Ramesh dvara x din main Kiya jayega

: x/12=4/5

x =48/5 din

Answer 2

The work last for 10 days.

Step-by-step explanation:

Consider the provided information.

Ramesh can do a piece of work in 20 days.

Work done in 1 day is: $\frac{1}{20}$

Ramesh started the work alone for 4 days.

The work done by Ramesh in 4 days are: $\frac{4}{20}$

Ramesh and suresh can do a piece of work in 20 days and 12 days respectively.

If they work together, then work done of 1 day is: $\frac{1}{20}+\frac{1}{12}=\frac{8}{60}$

Let they work together for x days.

$\frac{4}{20}+x(\frac{8}{60}) =1$

$x(\frac{8}{60}) =1-\frac{4}{20}$

$x(\frac{8}{60}) =\frac{16}{20}$

$x=\frac{16}{20}\times\frac{60}{8}$

$x=6$

Thus, together they work for 6 days.

Total number of days = 6 days + 4 days = 10 days

Hence, the work last for 10 days.

#Learn more

If 2 men or 3 boys take 40 hrs to do a certain piece of work ,how long will 4 men and 9 boys working together take to complete the work?

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