Question

can you solve it challange..

a container is filled by a faucet in A hours
and it is emptied by a drain in B hours
difference between B and A is 1

if both of faucet and drain are on how much time will it take to fill the container.

Answer 1

by A in A hr
by B in -B hr
lcm AB
A-B=1
AB/1=AB hrs

Answer 2

hey....u can do like this