Question

the length and breadth of rectangular garden is in the ratio 4:3 if the area is7500m sq , find the cost of fencing the garden at the rate of ₹6per meter.

Answer 1

let length and breadth be 3x and 4x
Area is already given 7500 m sq
4x ×3x=7500
12x=7500
625= x
Length =3×625=1875m
breadth= 2500m
area= length ×breadth
=1875×2500
4687500 m square=area
the cost of fencing = area × per meter
square
=4687500×6
=28125000 meter square

Answer 2

l=4x and b= 3x
area =lb
7500= 12x^2
7500/12=x^2
25=x
l=4×25=100m
b=3×25=75m
perimeter = 2(l+b)
= 2(100+75)
=2×175
= 350m
cost of fencing= 6×350
= 2100rupees