Question

Exercise 15.1 1. The length and breadth of a rectangular field are in the ratio 9 : 5. If the area of the fiel is 14580 square metre, find the cost of surrounding the field with a fence at the rate 3.25 per metre. da nf the square whose area equals the area of

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Answer 1

Answer:

₹1638

Step-by-step explanation:

45x2=14580

X2=324

X=18

l=162

b=90

perimeter =252*2

=504

total cost =

504*3.25

=1638

Answer 2

Let the length and breadth of the rectangle be 9y and 5y, respectively.

Area of a rectangle= l×b

14580=9y×5y

14580= 45y²

14580/45= y²

y= √324

y=18

length= 9y=9×18=162m

breadth= 5y=5×18=90m

Perimeter= 2l+2b

= 2(162)+2(90)

=504m

Rate of fencing= ₹3.25/m

Cost= Perimeter×Rate

= 504m× ₹3.25

= ₹1,638

So, the cost of fencing the field is ₹1,638.

Hope it helps you.