28 m : 40 d m
Evaluate
\frac{7dm^{2}}{10}
Differentiate w.r.t. d
\frac{7m^{2}}{10}
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\frac{7}{10}mdm
Divide 28m by 40 to get \frac{7}{10}m.
\frac{7}{10}m^{2}d
Multiply m and m to get m^{2}.
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