Question

Three taps can fill a tank . tap 1 alone can fill the tank in 30 minute. tap 2 can fill it in 40 minute while tap 3 can fill it in 60 minute. If all the three taps are opened together, How long will it take to fill the tank?
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Answer 1

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Answer 2

Step-by-step explanation:

tap 1 alone can fill in 1 /30

Tao 2 alone can fill in 2/40

tap 3 alone can fill in 3/60

1/30+2/40+3/60

4/120 + 3/120 + 2/120

9/120=3/40

put in mixed fraction answer is 13⅓

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