Question : 15 taps can fill a tank in 36 minutes. How many taps will be required to fill the tank in one hour?
Option 1: 12
Option 2: 9
Option 3: 8
Option 4: 6
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Correct Answer: 9
Solution :
According to the question,
15 taps can fill the tank in 36 minutes
$M{_1}T{_1} = M{_2}T{_2}$, where $M{_1}$ and $M{_2}$ are the number of taps required in both the cases and $T{_1}$ and $T{_2}$ are the time taken
⇒ $15\times 36=M{_2}\times 60$
⇒ $M{_2} = \frac{15\times 36}{60}$
⇒ $M{_2} = 9$
Hence, the correct answer is 9.
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