Question

The cost of developing a garden around the house at the rate of ₹ 50 per m² is ₹18000.

Answer 1

Step-by-step explanation:

Question

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The cost of fencing of a square field with rate of Rs 20 per metre is Rs 10080. How much will it cost to lay a three metre wide pavement along the fencing inside the field at rate of Rs 50 per sq metre?

Medium

Solution

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Correct option is

B

Rs 73,800

Given :

Total cost of fencing =Rs. 10080

Cost of fencing per meter =20

So perimeter =

20

10080

=504 m

So length of square =

4

504

=126 m

width of pavement =3 m

Length of inner square =126−3=120 m

So, area of pavement =Area of Outer square − Area of inner square

=126×126−120×120

Area of pavement=1476 m

2

Cost of pavement =1476×50

∴ Cost of pavement=Rs. 73800

Answer 2

Answer:

Given,

Side of square plot = 24 m

Length of house (l) = 18 m

and breadth (b) = 12m

Now,

Area of square plot = (24)2 m2 = (24 × 24) m2 = 576 m2

And,

Area of house = 18 × 12 = 216 m2

Remaining area of the garden = 576 m2 – 216 m2 = 360 m2

The cost of developing the garden = ₹50 per m2

Therefore, the total cost = ₹50 × 360 = ₹18000.

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