Evaluate
30km
Differentiate w.r.t. k
30m
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\frac{12km\times 5}{2}
Divide 12km by \frac{2}{5} by multiplying 12km by the reciprocal of \frac{2}{5}.
\frac{60km}{2}
Multiply 12 and 5 to get 60.
30km
Divide 60km by 2 to get 30km.
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