Question

The ratio of the length to breadth of a rectangular lawn is 3:5. It costs ~ 3200 to fence it

at the rate of ~ 2 a meter. What would be the cost of developing the lawn at the rate of

~ 10 per square meter?​

Answer 1

Answer:

MATHS

The cost of levelling a square lawn at Rs.15 per square meter is Rs.19,935. Find the cost of fencing the lawn at Rs.22 per meter.

December 20, 2019avatar

Nitesh Kalsoor

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ANSWER

Cost of levelling =Rs.15 per square meter

Let A be the area of lawn.

Therefore,

Cost of levelling lawn =15×A=Rs.19,935(Given)

⇒A=

15

19935

=1329m

2

As we know that,

Area of square =a

2

Here a is the edge length of square.

Since, lawn is in square form.

Therefore,

Side length of square (a)=

A

=

1329

=36.45m

Perimeter of square =4a=4×36.45=145.82m

Now,

Cost of fencing =Rs.22 per meter

Therefore,

Cost of fencing lawn =22×145.82≈Rs.3208

Answer 2

Step-by-step explanation:

(3x+5x)×2=3200

16x=3200

x=200

length =5×x

=1000th

breath=3×x

=600m

area = l×b

= (1000×600)

=600000=6×10^5

cost = 6×10^6