Question

A hedge boundary needs to be planted around a rectangular lawn of size 72 m × 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

∵ Perimeter of rectangle = 2 × (Length + Breadth)

∴ 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 × Perimeter of rectangular lawn = 3 × 180 = 540