Question

pls help me to solve this question ​

Answer 1

Step-by-step explanation:

this is right answer hope it helps ............

Answer 2

Answer:

A+B+C TOGETHER WORK IS 60/12 DAYS

B'S ALONE WORK IS 60 DAYS

Step-by-step explanation:

A+B's One day work =1/12

B+C's One day work =1/15

C+A's One day work =1/20

A+B+C's One day work =1/12 EQUAL THE DENOMINATORS =5/60+4/60+3/60

12/60 IS ONE DAY WORK

60/12 IS THE TOTAL TIME

B can alone do this work in=1/12- 1/15

EQUAL THE DENOMINATORS

5/60-4/60 = 1/60

1/60 is one day work

60days is the total time