Question

A 80 m by 64 m rectangular lawn 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 gravelling the roads at 24 per m2​

Answer 1

Answer:

Length of rectangular lawn = 80 m

Breadth = 64 m

Width of road = 5 m

Area of horizontal road =5×80=400m

2

Area of vertical road =5×64=320m

2

Area of common part to both roads =5×5=25m

2

Now,

Area of roads to be gravelled = Area of horizontal road + Area of vertical road − Area of common part to

both roads

=400+320−25

=695

Therefore, Area of roads to be gravelled is 695m

2

The cost = 695x24

= 16680

Step-by-step explanation:

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Answer 2

Answer:

Rs 16,680

step by step explanation;

Length of rectangular lawn = 80 m

Breadth = 64 m

Width of road = 5 m

Area of horizontal road =5×80=400m

2

Area of vertical road =5×64=320m

2

Area of common part to both roads =5×5=25m

2

Now,

Area of roads to be gravelled = Area of horizontal road + Area of vertical road − Area of common part to

both roads

=400+320−25

=695

Therefore, Area of roads to be gravelled is 695m

2

Cost of gravelling =695×Rs24 per m

2

=Rs 16,680