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A fish swims across the width of an 18 m wide river in 6 s. What is the speed of the fish?
We know that,
$Speed\ =\ \frac{Distance}{Time}$
given, distance = 18m and time = 6s
Therefore, $Speed\ =\ \frac{Distance}{Time} \ =\ \frac{18}{6} \ =\ 3\ m/s$
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