Question

the length and breadth of a rectangular fieldbare in the ratio 9:5. if the area of the field is 14580 square metre, find the cost of surrounding tje field with a fence at the rate of 3.25 per square metre

Answer 1

let the ratio of length and breadth is 9x and 5x respectively.
Area of Rect. = l*b
=> 14580 = 9x * 5x
=> 45x^2 = 14580
=> x^2 = 324
=> x = 18
Cost of fencing = Rate * Area
=> Cost = 3.25 * 14580
=> Cost = Rs. 47385.

Answer 2

first use ratio to find dimensions then find perimeter and multiply it by cost per metre.