Please answer no 16 ...

Dear Student
Weight of 1 box  = 4. 5 kg
                           = 4500g                                 ( 1kg =1000g)

Weight that van can carry = 800kg  = 800000g

Number of boxes that can be loaded  
                                                                =               $\frac{800000}{4500} = 177.77$

Therefore the number of boxes that can be loaded = 177


Regards