Question

the area of a rectangle field is 300000 sq. m. the length and breadth are in ratio 6:5 .find the cost of putting a fence by a barbed wire four time round it at the rate of rs 1.25 per metre​

Answer 1

suppose,

the length and the breadth of this rectangle are 6a and 5a .

So, as the condition,

6a ×5a =300000

or,. 30a^2 =300000

or, a^2=10000

or, a =100

so, the length and the breadth of the rectangle are 6a=6×100=600 and 5a=5×100=500

so the latitude of the rectangle is 2(600+500)

=2200

finally the cost of putting a fence by a barbed wire four time round is

=(2200×1.25×4)

=11,000 rupees (as the barbed is

fenced 4 time)