Answer : 1.38 acres field are planted with wheat.
Step-by-step explanation :
As we are given that a farmer plants 0.4 fields of wheat and the size of field is, 3.45 acres.
Now we have to determine the number of acres field are planted with wheat.
Number of acres field are planted with wheat = Field of wheat × 3.45 acres
Number of acres field are planted with wheat = 0.4 × 3.45 acres
Number of acres field are planted with wheat = 1.38 acres
Thus, 1.38 acres field are planted with wheat.