A rectangular water tank is 90 cm wide and 40 cm deep.

Question:

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

Solution:

Capacity of the water tank $=576$ litres $=0.576 \mathrm{~m}^{3}$

Width $=90 \mathrm{~cm}=0.9 \mathrm{~m}$

Depth $=40 \mathrm{~cm}=0.4 \mathrm{~m}$

Length $==\frac{\text { capacity }}{\text { width } \times \text { depth }}=\frac{0.576}{0.9 \times 0.4}=1.600 \mathrm{~m}$

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