A vegetable plot is $20$ metres long. Cauliflowers are planted in a row down the length of the plot. They are planted $40  \text{cm}$~apart and the first cauliflower is planted $20  \text{cm}$~from the end. How many cauliflowers can be planted in a row? 
Overseas Competition->Knowledge Point->Word Problem Modules->Interval Problems->Straight Line Type with Objects on Both Sides->Planting Trees on Both Sides