the length and breadth of a rectangular field are in the ratio 5;3.the area of the field is 2160sq.m.if a fence is to be made at the rate of rs.350 per metre,how much will it cost?
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Answered by
3
Let the length and width be 5a and 3a
Area = Length × Width
=> 2160 = 5a × 3a
=> 15a^2 = 2160
=> a^2 = 144
=> a = 12
Length = 60 m
Width = 36 m
Perimeter = 2 (60 + 36)
= 2 (96)
= 192 m
Cost = 192 × 350
= Rs 67,200
Area = Length × Width
=> 2160 = 5a × 3a
=> 15a^2 = 2160
=> a^2 = 144
=> a = 12
Length = 60 m
Width = 36 m
Perimeter = 2 (60 + 36)
= 2 (96)
= 192 m
Cost = 192 × 350
= Rs 67,200
Answered by
8
Let the length and width be 5a and 3a
Area = Length × Width
=> 2160 = 5a × 3a
=> 15a^2 = 2160
=> a^2 = 144
=> a = 12
Length = 60 m
Width = 36 m
Perimeter = 2 (60 + 36)
= 2 (96)
= 192 m
Cost = 192 × 350
= Rs 67,200
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