Here's how to solve the problem:First, convert the mixed number to an improper fraction: 2 [tex] \sf {\frac{1}{2} = \frac{5}{2}}[/tex]Then, multiply the number of sacks by the weight of each sack: [tex]\sf {\frac{5}{2} \times 45 = \frac{225}{2} = 112.5}[/tex].[tex] \\[/tex]Final answer:The farmer harvested [tex] \sf { 112 \frac{1}{2} }[/tex]kilograms of rice.