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Question

The length and breadth of a rectangular field are in the ratio 7:4. The cost of fencing the field at Rs. 25 per metre is Rs. 3300. Find the length (in m) of the field.

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Solution

Let length of rectangle be x m
Raito of length and Breadth=7:4
xBreadth=74
Breadth=4x7
Cost of fencing 1m=Rs. 25
Cost of fencing the fluid =Rs. 3300
Perimeter of rectangle × cost of fencing 1cm = cost of fencing the field.
2(l+b)×25=3300
50(l+b)=3300
l+b=66
x+4x7=66
11x=66×7
x=42
Length =42m
Breadth=24m.

1169305_1280789_ans_6ea7665e243e4d8cb0bfc89ee7e28082.jpg

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