Question

A, b, c can do a work in 20 days. they worked together for 8 days, then a left the work,and b and c finished the remaining work in 20 days.

Answer 1

Here is your answer brother

A,B,C WORK TOGETHER
=> [ 1/20×8]
=> 2/5

Remaining work
=> [ 1 - 2/5]
=> [( 5-2)/5]
=> 3/5
Now work 3/5 done by B&C
=>so whole work done by B& C
=> 5/3×20
=> 100/3 =>33.33