the length and breadth of a rectangular field are in the ratio of 7 :4 the cost of fencing the field at rupees 25 per metre is rupees 3300 find the dimensions of the field
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Answered by
2
2(7x+4x) * 0.25 = 3300
22x * 0.25 = 3300
5.5x = 3300
x = 600
Dimensions are
1) 7x = 7 * 600
= 4200 m
2) 4x = 4 * 600
= 2400 m
Answered by
3
Given,
Cost per metre = 25
Total cost = 3300
Thus, the total length= total cost/ cost per metre.
= 3300/25= 132 Mt.
Thus,
Let the common multiple between the length and breadth be X
Thus, length (l) = 7x and breadth (b) = 4x
Perimeter = 132 = 2(l+b)
132= 2(7x+4x)
132/22= X
Thus, X = 6 Mt.
Length = 7x= 42mt.
Breadth= 4x= 24mt.
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