Question

the cost of fencing a square field at 1.60 per meter is 3200. Find the cost of reaping the field at 1.20 per 100 sq metres.

Answer 1

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..Rate of fencing of 1 m of the square field=₹1.60

Total Cost of fencing the square field=₹3200

Perimeter of a square field= total cost/ rate

Perimeter of the square field = 3200/1.60

=32000/16 m

Perimeter of the square field= 2000 m

Perimeter of the square field =4×side

2000 = 4 × side
Side= 2000/4
Side= 500 m

Area of the square field = side × side

Area of the square field = 500 × 500

Area of the square field =250000 m²

Rate of reaping 1 m² of the square field is ₹ 1.20/100 (given)

Cost of reaping 250000 m² square field= Area× Rate of reaping

= 250000× (1.20/100)
=250000× (0.012)
=₹ 3000

Answer 2

3200/100=32
1.20×32=38.40