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No water comes in. The drain at the bottom is opened for 2 hours. What fraction of the tank will still have water in it?

Class 7Tanks and Taps with FractionsFractions and Decimals

A1/4
B5/8
C1/8
D1/2

Step-by-Step Solution

The tank is

\frac{3}{4}

full. The drain removes

\frac{1}{8}

of the tank per hour, so

\frac{2}{8} = \frac{1}{4}

in 2 h. Left

= \frac{3}{4} - \frac{1}{4} = \frac{1}{2}

.

Answer: D) 1/2

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