Question

VII
Find the cost of fencing a rectangular field, whose length and breadth are 150 m and
120 m and the cost of fencing 2 metre length is 3.
The length and breadth of a rectangle are in the ratio of 3 : 2. If the breadth is 120 m,​

Answer 1

Step-by-step explanation:

firstly find the perimeter of the rectangle.

given that length is 120 m and breadth is 150 m

perimeter=2(length) + 2(breadth)

p=2(120)m + 2(150)m

p=240m+300m

p=540m

cost of fencing 2m is 3

so,

cost of fencing 540m will be

(540×3)÷2

=1620÷2

=810

hence, cost of fencing will be 810

Now,

if breadth is 120m,

and length and breadth are in ratio of 3:2,

then breadth will be

2x=120

x=120÷2

x=60

so,

length will be

3x

=3(60)

=180

hence,length will be 180m