Question

11. A rectangular lawn 70 m by 50 m has two roads, each 5 m wide, running through its
middle, one parallel to its length and the other parallel to its breadth. Find the cost of
constructing the roads at * 120 per m².




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Answer 1

Answer:

69000

Step-by-step explanation:

Area of the road

= (70*5)+(50*5)-(5*5) m^2

=( 350+250-25) m^2

= (600-25) m^2

=575 m^2

Cost for constructing roads

= 575*120

= 69000

Answer 2

Answer:

69 000$ to construct the roads.

Step-by-step explanation:

Road 1:

5m x 50m = 250m squared

Road 2:

5m x 70m = 350m squared

Since the roads overlap, you need to minus that:

5m x 5m = 25m squared

(250m squared + 350m squared) - 25m squared = 575m squared of road needed

To find the cost:

575m squared of road x 120$ per m squared = 69000$

Image to understand better :

https://i.gyazo.com/abc8159eadba7b4526467a4731051b5d.png