A hedge boundary needs to be planted around a rectangular lawn of… - Vidyadip

Question

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

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Answer

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

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