the length and breadth of a rectangular field are in ratio 7:5 and its perimeter is 384 . Find the cost of reaping the field at rupees 1.25 per sq. metre.
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Step-by-step explanation:
let the length and breadth = 7x , 5x
perimeter of a rectangle = 2(l+b)
384 = 2 ( 7x+ 5x)
384 = 14x + 10x
384 = 28x
x = 384/28
x = 16
length = 7(16)
= 116 m
breadth = 5 ( 16)
= 80
area = l X b
= 116m X 80m
= 9280 sq. m
cost of reaping field per sq. m = Rs 1.25
total cost = 1.25 X 9280
= 11600 Rs.
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