Question

the cost of fencing a rectangular field at Rs7.50 per m is Rs600 if its length is 26 m find its breath

Answer 1

Answer



Length of the fence = perimeter of the circle = 2πr where r is the radius

Cost of the fencing at Rs. 16 per metre= Rs. 5632
2πr × 16 = 5632
πr = 176
22
7
227 × r = 176
r =
176
×
7
22
176×722 = 56 metre

Area of the path = area of the outer circle - area of the inner circle
= π(r+4)2 - πr2 =π(r2+ 8r + 16 - r2)
=π(8r + 16) =8π(r + 2)
=
8
×
22
×
58
7
8×22×587 square meter

Required cost = Area × 21 =
8
×
22
×
58
×
21
7
8×22×58×217 = 8 × 22 × 58 × 3 = Rs. 30624

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Answer 2

Heya Friend
Here is your Answer..
》》》》》》》》》》

Cost of fencing at the rate of Rs.7.50 = Rs600

Length = 26m

Perimeter = Fence length,
so, Perimeter = 600/7.50 = 80 m

Perimeter of Rectangle = 2 (l+b)
Let breadth be x.
2 ( 26 + x ) = 80
52+2x = 80
2x = 80-52 = 28
x = breadth = 28 m

Hope it helps!!