Question

A lawn is in the form of rectangle whose sides are in the ratio 5:3. The
area of the lawn is 3375 m. Find the cost of fencing the lawn at 65 per
metre. plzzz solve this question​

Answer 1

Answer:

Let the length and breadth of the rectangle be 5x and 3x ,

Now,

Area = l * b

= 5x * 3x

= 15x²

or, 3375m² = 15x²

or, x² = 225

or, x = 15

Then , Length = 5x = 5*15 = 75

Breadth = 3x = 15

Next,

perimeter = 2{ l + b} = 2 { 75 + 15 } = 2* 90=180m

cost of fencing = 180 m * 65

=Rs 11,700 ans