Question

the lenth &breath of a rectangular feild are in the ratio 5:4 and its area is 3380sq.m .Find the cost of fencing it at the rate of rs 75 per m

Answer 1

Answer:

Step-by-step explanation:

let the  length and breadth of a rectangular feild be 5x , 4x

now area = l*b=5x*4x=(20)2

area=3380sqm ,=(20)2=3380

(x)2=169

=x=sq.rt of 169 =13m(side)

= 5x =65m

4x=52m

perimeter = 2(l+b)=2(65 + 52)m

=2*117m=234m

now ,cost of one m fencing = 75

total cost = rs.234*75=rs.17550(ans)