Question

can you help 25 points if CRT answer​

Answer 1

Answer:

Solution :

 A and B can do a task in 12 hours, while B and C can do the same task in 20 hours and C and A can complete the same work in 10 hours.

So, in 1 hour

A and B does 1/12 th of the entire work

B and C does 1/20th of the entire work

A and C does 1/10th of the entire work

Adding them

2 [ A + B + C ] does 1/12 th + 1/20 th + 1/10th in an hour

=> 2 [ A + B + C ] > 7/30 th of the work in an hour .

=> A , B and C does 7/60th of the entire work in 1 your .

They take 60/7 hours to finish the entire work together

=> 8 (4/7 ) hours

This is the required answer .

_________________________________________