The ratio of length and breadth of a rectangular field is 5:9. If the total cost of surrounding it at the rate of Rs 7.50 per meter is Rs 4200, then find the difference between the length and breadth of the field.
The ratio of length and breadth = 5:9 Length of field = 5x and breadth = 9x Then perimeter of field = 2(5x+9x) = 28x ATQ- 28x × 7.50 = 4200 28x = 4200/7.50=560 x = 20 Now difference between length and breadth =4×20 = 80 meters
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