Question

The area of the rectangular field is 7875 m2 . If the length and breadth are in the ratio of 7:5. Find the cost of fencing the field @ 5.25 per cm.

Answer 1

Answer:

1800rs

Step-by-step explanation:

as given ration of l/b=7:5

let multiply both numerator and denominator by 'x' to RHS

we get l/b=7x/5x

from this equation concluding that

l=7x , b=5x

we know that area of rectangle is

where area A=7875

A=l*b

putting all the values

7875= 7x*5x

solving this equation

x=15

putting the value of x in l & b

l=7*15=105m

b=5*15=75m

now finding the sum of boundaries or we can say perimeter

P= 2(l+b)

P= 2(105+75)

P=360m

now rate of fencing for 1m is 5rs

for 360m = 360*5= 1800

hence ans is 1800