Question

a can do a piece of work in 14 days while B can do in 21 days they begin together but three days before the completion of work a leaves ok find the total number of days taken to complete the work​

Answer 1

Answer:

10.2 days

Step-by-step explanation:

there are lot of methods to find this answer

I'm using the basic and easy method here

$\frac{a \: (worked)}{a \: (capacity)} + \frac{b \: (worked)}{b \:(capacity)} = 1$

1 is for work completed

we consider

a worked for x-3days (a worked 3 days less than b)

a capacity is 14 days (given)

b worked for x days( b worked for the total days)

b worked for 21 days (given)

solve this formula you will get ans

10.2 days

any doubt ask me

please mark this as brainliest answer