Question

One tap fills a tank in 20 minutes and another tap fills it in 12 minutes. The tank being empty and if both taps

are opened together,in how many minutes the tank will be full?
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Answer 1

Answer

15/2

Step-by-step explanation:

Given,

The first tap fills a tank in 20 minutes

The second tap fills a tank in 12 minutes

first tank in 1 min       =  1/20 parts

second tank in 1 min = 1/12 parts

      both  together   =     1/12 +1/20

                                  =     (5+3)/60

                                  =      8/60

                                  =       2/15

both in 1 min              =1/2/15    =15/2