Question

A rectangular piece of ground is 60 m long and 45 m wide. Find the cost of levelling it at
80 paise per square metre.

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Answer 1

Step-by-step explanation:

Solution :-

Length = 45 m

Breadth = 30 m

Area of whole piece of rectangular land = L*B

⇒ 45*30 = 1350 m²

So, area of the whole rectangular piece of land = 1350 m²

Now, 

Length of the 1st road parallel to the length = 45 m

Breadth of the 1st road parallel to the length = 1 m

Area of the 1st road = 45*1

= 45 m²

Length of the 2nd road parallel to the breadth = 30 m

Breadth of the 2nd road parallel to the breadth = 1 m

Area of the 2nd road = 30*1

= 30 m²

Area of the common part of 2 roads = 1*1 

= 1 m²

Total area of 2 roads = Area of 1st road + Area of 2nd road - Area of common part

⇒ (45 + 30) - 1

⇒ 75 - 1

= 74 m²

So, the area of the 2 roads is 74 m²

Now,

Area of the remaining ground = Area of the whole rectangular piece of land - Area of 2 roads

⇒ 1350 - 74

= 1276 m²

Area of the remaining ground is 1276 m².

Answer 2

Answer:

₹2160

Step-by-step explanation:

L=60m

B=45

Now,

area of rectangle =L×B

=60×45

=2700m^2

Now,.

cost of levelling it =80 paise per square metre

therefore

cost of leveling =2700×80

=216000 paise

Converting in rupees = 216000/100

=₹2160.00