Question

a takes 6 hours to do a job. b also takes 6 hours to do the same job. how long should it take for both a and b , working together, to do the same job?

Answer 1

Here
A+B =6
And A=B because a and b both takes similar time to do a job so
We write b in place of a
B+B=6
2B=6
B=3 and so A a
lso takes 6 hours to do a job. Plz mark me brainliest.