Question

A and B can do piece or work in 10 days B and C can do it 15 days and A and C can do it 20 days how long will they take to do it together and individually​

Answer 1

Answer:

120/3 days

Step-by-step explanation:

A and B can do work in 10 days

B and C can do it 15 days

A and C can do it 20 days

One day work of A and B = 1/10 th of work

One day work of B and C = 1/15 th of work

One day work of A and C = 1/20 th of work

$\frac{1}{10} + \frac{1}{15} + \frac{1}{20} = \frac{13}{60}$

2 ( A + B + C ) = 60/13 days

A + B + C = 120 / 13 days