Question

mensuration chapter RS agarwal
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Answer 1

Answer:

l=140m

b=80m

cost=RS66,000

Step-by-step explanation:

l:b=7:4

so,

l=7x ,  b=4x

perimeter of rectangle = 440m

440=2(7x+4x)

440\2=11x

x=20

l=7(20)=140

b=4(20)=80

cost=perimeter * cost per meter

cost per meter=RS150

cost=440*150

cost=  RS66,000

Answer 2

Answer:

let the length be 7x

let the breadth be 4x

perimeter =2(l+b)

2(7x+4x)=440

2(11x)=440

22x=440

x=20

therefore,

length=7*20=140

breadth=4*20=80

for cost of fencing

perimeter into cost

so,

440*150=

66000 rupees

thank u

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