A rectangular water tank is 90 cm wide and 40 cm deep. If it can contain 576 litres of water, what is its length?

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Solution

Width of tank =90 cm $= \frac{90}{100} m$

Depth =40 cm $= \frac{40}{100} m$

Water =576 litre

$∴$ Volume of tank $= \frac{576}{100} m^{3}$

$∴$ Length $= \frac{V o l u m e}{W i d t h \times D e p t h}$

$= \frac{576 \times 100 \times 100}{90 \times 40 \times 1000}$

$= \frac{16}{10} m = 1.6 m$

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