Question

If there are three people A B C, all of them has the same job that is to sweep the home.

WHEN
A+B=2 HOUR
A+C=3 HOUR
B+C=4 HOUR

THEN WHAT WILL THE ANSWER OF, WHEN ALL OF THEM WILL DO ALTOGETHER,
A+B+C=?

Answer 1

A+B=2 HOUR

A AND B DO IN 1 HOUR=1/2

A+C=3 HOUR

A AND C DO IN 1 HOUR =1/3

B+C=4HOUR

B AND C DO IN 1 HOUR =1/4

THEREFORE 2(A+B+C) DO IN 1 HOUR =1/2+1/3+1/4

=6+4+3/12

=13/12

A+B+C=13/24

THEREFORE THEY ALL DO THE WHOLE WORK IN 24/13 HOURS

Answer 2

Answer:

4 HOUR'S AND 30 MINUTES

Step-by-step explanation:

A+B=2 HOUR

THAT'S 0.5 + 1.5 =2 HOURS

A+C= 3 HOUR

THAT'S 0.5 + 2.5 = 3 HOURS

B+C=4 HOURS

THATS 1.5 + 2.5 = 4 HOURS

THEN, A+B+C= 0.5 + 1.5 + 2.5 = 4.5 HOURS