# The area of a rectangular field is 768m and its length is 32 m. Find the cost of fencing it at ?20 per metre

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pls vote
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I think the answer should be 15360.
Area=768
Length= 32
Cost od fencing= Rs. 768 ? 20= Rs. 15360
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I think the answer should be 15360.?
Area=768?
Length= 32?
Cost od fencing= Rs. 768 ? 20= Rs. 15360
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length = 32 m
area of rectangle = 768 m
l*b   = 768
32*b  =768
b  =768/32
=24 m

perimeter of rectangle  = 2(l*b)
= 2(32*24)
= 2*768
= 1536 m

cost   = 1536*20
= Rs 30720
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15360
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Rs 15360
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SinceA /l =b
Therefore ; b= 768?32 = 24 m
Now perimeter= 2(l+b) therefore p = 2(32+24)m
=2?56m
P= 112m
Cost of fencing =rupees 20 / m
Total cost = 20 ? 112 rupees
= rupees 2240
Cheers!!
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15360
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given:
length=32m
area of field=768m

l*b=area
32m*b=768m
b=768/32
=24
As we now know the length and breadth, we can easily find the perimeter,
Now,
perimeter=2(l+b)
=2(32m+24m)
=2*56
=112m
Cost of fencing per metre=Rs.20
Cost of fencing for 112m=112m*Rs20
=Rs.2240

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