Q73 of 131 Page 226

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?


Given, length of the lawn = 72 m


Breadth of the lawn = 18 m


We know that, perimeter of rectangle = 2 × (l + b)


So, perimeter of the lawn = 2 × (72 + 18) = 2 × 90 = 180 m


i.e. Length of hedge boundary = 180 m


No. of shrubs to be planted in 1 m of hedge = 3


No. of shrubs to be planted in 18 0m of hedge = 3 × 180 = 540


More from this chapter

All 131 →
71

State whether the statements are True or False.

Two figures can have the same area but different perimeters.

 72

State whether the statements are True or False.

Out of two figures if one has larger area, then its perimeter need not to be larger than the other figure.

 74

People of Khejadli village take good care of plants, trees and animals. They say that plants and animals can survive without us, but we can not survive without them. Inspired by her elders Amrita marked some land for her pets (camel and ox) and plants. Find the ratio of the areas kept for animals and plants to the living area.

 75

The perimeter of a rectangle is 40 m. Its length is four metres less than five times its breadth. Find the area of the rectangle.