Answer
$5.4 cm^2$
Work Step by Step
Area can be calculated as: $A= L \times W$
The differential form of the given function can be evaluated as follows:
$dA=(\dfrac{\partial A}{\partial L}) dL + (\dfrac{\partial A}{\partial W}) dW$
Here, $dA=(24) \times (0.1)+(30) \times (0.1)$
or, $dA=[2.4+3.0] cm^2$
Hence, we have $dA=5.4 cm^2$
