Shane has to fill a water tank in 3 hour 40 minutes and he used 7 pipes for that. How many pipes should he use to fill the tank in 1 hour 21 minutes? ( approx to nearest whole number)

21 pipes

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19 pipes

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7 pipes

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30 pipes

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Solution

The correct option is B
19 pipes

Let us assume that the required number of pipes be y.

$\begin{matrix} N u m b e r o f p i p e s & 7 & y T i m e (i n m i n u t e s) & 220 & 81 \end{matrix}$

$\frac{7}{y}$ = $\frac{81}{220}$

$220 \times 7 = y \times 81 \Rightarrow y = \frac{7 \times 220}{81} = 19.01 \approx 19$

Shane has to use 19 pipes to fill the tank in 1 hour 21 minutes.

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Shane has to fill a water tank in 3 hour 40 minutes and he used 7 pipes for that. How many pipes should he use to fill the tank in 1 hour 21 minutes? ( approx to nearest whole number)

The correct option is B 19 pipes Let us assume that the required number of pipes be y. Number of pipes7yTime (in minutes)22081 7y = 81220 220×7=y×81⇒y=7×22081=19.01≈19 Shane has to use 19 pipes to fill the tank in 1 hour 21 minutes.