Question

1. A and B can do a piece of work in 10 h, B and C can do it in 15 h, while A and C take 12 h to complete the work. In how many hours can B complete the work independently? ​

Answer 1

Answer:

given A+B=10. -(1)

B+C=15. -(2)

A+C=12. (3)

from eqn(1) B=15-C

eqn(2)A=12-C

sub. A and B values in eqn(3)

we get B=6.5hours

Answer is B=6.5 hours