Question

the area of a square plot is 40,000sq.m find the cost of painting at 4.50rs per metre​

Answer 1

Answer:

Rs 3600

Step-by-step explanation:

Area of square plot = 40000 m²

            side²            = 40000 m²

            side             = √40000 m²

            side             = 200 m

Thus,

perimeter of square = 4  x side

                                  = 4 x 200 m

                                  = 800 m

∴ Cost of painting = rate x perimeter

                              = Rs 4.5 x 800

                              = Rs 3600

Using:

 Area of square = side²

Perimeter of square = 4side

Cost = rate x perimeter (or area, according to question)