4. The ratio of length and breadth of rectangular plot be 7: 4. The total cost of fencing the plot at the rate of 100 per metre is 55000. What are the dimensions of the plot?
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therefore perimeter of the rectangular field = 16500/75
= 220m
formula for the perimeter of a rectangle is 2(l + b)
2(l + b) = 220m
2(7x + 4x) = 220m
7x + 4x = 220/2
11x = 110m
x = 110/11
x = 10m
hence,
length of the rectangular field = 7x
= 7 × 10
= 70m
breadth of the rectangular field = 4x
= 4 × 10
= 40m
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