Question

A does 80% of work in 20 days , he then calls b and they together finish remaining work in 3 days how long b alone can do the work​

Answer 1

Answer:

75/2 days

Step-by-step explanation:

A does 80% of work in 20 days

A can do 100% work in 25 days

Consider Total work = 1

Then A can do 1/25 th of work in 1 day.

80 % of work of work is completed by A in 20 days. 4/5 th of work is completed.

A and B can do remaining 1/5 th of work in 3 days

$\frac{1}{25} + b = \frac{1}{5 \times 3}$

b can do a work in 75 / 2 days .

(not sure.. it may be crct)