Question

Question 73

A hedge boundary needs to be planted around a rectangular lawn of size $72m\times 18$ m. If 3 shrubs can be planted in a metre of hedge, how many shrubs will be planted in all?

Answer 1

Here, length of rectangular lawn = 72 m and breadth of rectangular lawn = 18 m
$\because$ Perimeter of rectangle $=2\times (Length+Breadth)$
$\therefore$ Perimeter of rectangular lawn = 2(72+18) = 2(90) = 180 m
If 3 shrubs can be planted in a metre of hedge.
Then, number of shrubs $=3\times$ Perimeter of rectangular lawn $=3\times 180=540$