Question

A rectangular field is 80 m long . Find the perimeter and breath of the plot if its levelling costs 6000 at rs 3 per m2

Answer 1

Cost paid for levelling = cost per unit area * total area of the plot

area = lb

=80*b

so. 6000= 3*80*b

6000=240b

b=25m

perimeter =2(l+b)

=2(80+25)

=2*105 =210m

Answer 2

The perimeter is 210 meter.

Step-by-step explanation:

Given : A rectangular field is 80 m long.

To Find : The perimeter and breath of the plot if its levelling costs 6000 at rs 3 per m²?

Solution :

We know that,

Cost paid for levelling = Cost per unit area × Total area of the plot

Its levelling costs 6000 at rs 3 per m².

$6000=3\times \text{Total area of the plot}$

$\text{Total area of the plot}=\frac{6000}{3}$

$\text{Total area of the plot}=2000$

The area of the plot is given by,

$A=l\times b$

Here, A=2000 m² is the area

l=80 m is the length

$2000=80\times b$

$b=\frac{2000}{80}$

$b=25$

The breadth is b=25 m.

The perimeter is given by,

$P=2(l+b)$

$P=2(80+25)$

$P=2(105)$

$P=210$

Therefore, the perimeter is 210 meter.

#Learn more

A rectangular field is 80 m long and 60 M wide A 4 m wide is constructed outside the field around it find the area of road​

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