Question

The cost of fencing a square plot is rupees 32400 at the rate of rupees 90 per metre.

Find the cost of levelling the surface of the plot at the rate of rupees 20 per square metre.​

Answer 1

Since the total cost = 32400 rupees
And cost of one sq meter = 90 rupees
There area = 32400/90 = 360 sq meter.

Therefore cost of levelling = area x cost = 360 x 20 =7200 rupees

Answer 2

Step-by-step explanation:

Perimeter of field = 32400÷90×4 = 90m of one side of field

area of plot = 90² = 8100m²

cost of plotting 1m² = 20rs

cost of plotting the surface of plot = 8100×20 = 32400rs

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