Question

narendran can do work in 15days, trumph in 20days, gates in 30 days, Rahul in 60 days. if they work on it together for 4 days, then the fraction of the work that is left is.​

Answer 1

Answer:

Q11)A pressure of 10KPa acts on a surface area of 0.3m2

.Calculate the force acting here. (1KPa = 1000Pa)

Step-by-step explanation:

Answer 2

Given:

Narendran can do a work in $15$ days

Trump can do a work in $20$ days

Gates can do a work in $30$ days

Rahul can do a work in $60$ days

The number of days they work together = $4$

To find:

The fraction of work that is left.

Step-by-step explanation:

Narendran's one day work = $\frac{1}{15}$

Trump's one day work = $\frac{1}{20}$

Gate's one day work = $\frac{1}{30}$

Rahul's one day work = $\frac{1}{60}$

The work completed in $4$ days =  $4(\frac1{15}+\frac1{20}+\frac1{30}+\frac1{60})$

LCM of $15,20,30,60$ is $60$

The fraction of work left = $1-\;4(\frac4{60}+\frac3{60}+\frac2{60}+\frac1{60})$

The fraction of work left = $1-\;4(\frac{10}{60})$

The fraction of work left = $1-\;\frac23$

∴ The fraction of work left = $\frac{1}{3}$

Answer:

Therefore, the fraction of the work that is left is $\frac{1}{3}$