The width of the rectangular pond is: 3.5 m.
Thus, given the dimensions of the pond as:
Length = 4.2 m
Height = 50 cm = 0.5 m
Volume = 7.35 m³
Therefore:
4.2 × width × 0.5 = 7.35
width = 7.35/(4.2 × 0.5)
width = 3.5 m
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