Question

125. A tap can fill a cistern in 8 hours and an-
other can empty it in 16 hours. If both the taps
are opened simultaneously, find the time (in
hours) to fill the cistern
a) 14 hours
b) 10 hours
c) 16 hours
d) 20 hours
لد​

Answer 1

Answer:

Your answer is option (c)16 hours.

Step-by-step explanation:

Part of the cistern filled in 1 hour = 1/8

Part of the cistern emptied in 1 hour = 1/16

When both the taps are opened simultaneously, part of cistern fill in 1 hour

= 1/8-1/16

= 2/16-1/16

= 1/16

Hence, the cistern wil be filled in 16 hours.

Hope it helps you :)

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