Question

A finish the work in 4 hours .B and C together in 3 hours and A and C together finish the works in 2 hours. B ALONE WILL DINISH THE WRK IN HOW MANY HOURS?

Answer 1

Answer:

A finishes in 4 hrs

so, A=4

B and C finish in 3 hrs

so,B+C=3

A and C finish in 2 hrs

so, A+C=2

by substituting the value of A

we get, 4+C=2

=》 C=2-4

=》C=-2

Now, B+C=3

by substituting the value of C

we get, B+(-2)=3

=》B-2=3

=》B=3+2

=》B=5