A hedge boundary needs to be planted around a rectangular lawn 18meter long and 12meter wide . If 3shrubs can be planted to grow a metre of hedge ,how many shrubs will be needed in all?
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180 shrubs are needed.
Explanation:
It is given that,
The length of the hedge = 18 meter.
The breadth of the hedge = 12 meter.
∴ Perimeter of the hedge = 2(length+breadth)
= 2 × (18+12) meter
= 2 × 30 meter
= 60 meter.
The boundary of the hedge = perimeter of the hedge = 60 meter.
In 1 meter 3 shrubs can be planted.
∴ In 60 meter (60×3) shrubs can be planted.
= 180 shrubs.
∴ 180 shrubs are needed in all.
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