Can someone pls tell me the answer ?

the answer is 9m+2n

Step-by-step explanation:

For this case we have the following data:

The original dimensions of the drawing are:

If the copier zoom is at 120%, we can find the new dimensions of the drawing by making a rule of three:

Width:

3 ----------> 100%

x ----------> 120%

Where x represents the new width of the drawing:

Long:

5 ----------> 100%

y ----------> 120%

Where y represents the new long of the drawing:

Thus, the new dimensions are 3.6 cm wide and 6 cm long

the longer dimension of the new drawing is 6cm