Question

The cost of fencing a square plot is rupees 32400 at the rate of rupees 90 per meter. find the cost levelling the surface of the plot at the rate of rupees 20 per square meter.​

Answer 1

Answer:

Total cost of fencing a square plot =Rs.200

Rate of fencing =Rs2.50

∴ Perimeter of square =

Rate

Total cost

=

2.5

200

=80m

Since, we know that

Perimeter of square =4a

⇒80m=4a

⇒a=20m

∴ Length of square plot =20m

Answer 2

Question :

The cost of fencing a square plot is rupees 32400 at the rate of rupees 90 per meter. find the cost levelling the surface of the plot at the rate of rupees 20 per square meter.

To find :

The cost levelling the surface of the plot at the rate of rupees 20 per square meter.

Solution :

The cost of fencing = ₹ 32400

₹ 90/ meter

So 32400 ÷ 90 = 360 m

Area of square = 360 × 360 = 129600 m²

Cost of fencing = 129600 m² × ₹ 20/ m²

= ₹ 259200