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16-07-2019
Mathematics

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Two taps A and B can fill a cistern in 20 and 30 minif both are opend simultaneously how long will it take to fill the cistern

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16-07-2019

Answer:

12 minutes

Step-by-step explanation:

tap a fills 1/20 a minute, tap b fills 1/30 a minute. 1/20 + 1/30 = 5/60

5/60 = 1/12

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