Question

1) The length and breadth of a rectangular plot are in the ratio 7:5. The area of the plot is 2835 sq. m. Find the cost offencing the boundary at the rate of Rs. 12.50 per m,​

Answer 1

Answer

EXPLANATION:-

let the length and breath be 7x and 5x

therefore,

Area of the rectangle=length x breadth

2835=7x x 5x

2835=35x^2

x^2=81

Therefore,

x=9m

To find the cost of fencing the boundary we need to find the perimeter

But,

To find the perimeter we need to find length and breadth

that is:-

7x=7 x9=63m

5x=5 x9=45m

we know

Perimeter=2(length + breadth)

=2 x 108

Perimeter=216m

Cost of fencing=216 x12.50

Answer=₹2700

Hope this will help you