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Pipe M fills a tank in 10 hours. How much of the tank does it fill in 45 minutes?

Competition practicePipes & Cisterns

A $\frac{9}{20}$
B $\frac{1}{40}$
C $\frac{3}{4}$
D $\frac{3}{40}$

Step-by-Step Solution

45 min

= \frac{3}{4}

h. Part filled

= \frac{3}{4} \times \frac{1}{10} = \frac{3}{40} . (\frac{9}{20}

wrongly treats 45 min as 4.5 h.)

Answer: D)

\frac{3}{40}

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