Question

Each side of a square land of our village is 300 meters. We shall fence that square land by
3dem wide wall with same height around its four sides. Let us see that how much will it
cost for the wall at the rate of 5,000 per 100 sq. meter.​

Answer 1

Step-by-step explanation:

Area of wall = Area of outer square – Area of inner square

Length of outer square = 300 + 0.3m (3dcm = 0.3m)

= 300.3m

We know, area of square = (side)2

Area of outer square = 300.32 = 90180.09m2

Area of inner square = 3002 = 90000m2

Area of wall = 90180.09 – 90000 = 180.09m2

Rate per square metre of wall =  = Rs. 50/sq m

So for 1 m2 - - - - Rs. 50

180.09m2 - - - Rs. 50 × 180.09 = Rs. 9004.5

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