Question

Two pipes A and B together can fill a cistern in
4 hours. Had they been opened separately, then
B would have taken 6 hours more than A to fill
the cistern. How much time will be taken by A
to fill the cistern separately?
(a) 10 hr (b) 4 hrs
(c) 6 hrs (d) 8 hrs.

Answer 1

I thing the answer is d)8.I'm not sure.