1.A square lot is to be planted with santan plants all around.The side of the lot measures 10 m.If plants will be planted 20 cm apart,how many plants must be planted in all?

Answer 1

The perimeter would be 40 m
Visualize the perimeter as a single line.
at each 20 cm intervals there would be a pot, that would be 40/.20
or 200 pots. Notice the first pot would be at 20 cm, not at 0
but if we form the square, the last pot on the line would fall on the 0 position

number of plants = 200