Question

Three pipes A, B and C can fill a tank in 6 h. After working
together for 2 h, C is closed and A and B fill the tank in 8b
The time (in hours) in which the tank can be filled by pipe C
alone is​

Answer 1

Answer:

a+b+c fill a tank in 6 hour

means each hour they fill 1/6 part

after 2 hour c is closed, so they together worked for 2 hours

means 》total of (6) part (2) part is filled

remain work is of 4 hour means 1/4 each hour

a+b complete remaining work in 8 hours

》c alone can do remaining work in (1/4)-(1/8)

=(2/8)-(1/8)

=1/8 ...means 8 hour.

and C can fill complete tank in 12 hours