Question

Area of a rectangular park is 100 square meter. Length of the park is 15 meter
more than the breadth. If someone wants to fence along the sides of the park and
cost of fencing one meter is Rs. 5, then find the total cost of fencing all sides of the
park.​

Answer 1

Answer:

Step-by-step explanation:

l=b+15

area =l*b

100=b+15)*b

100=b^2+15b

b^2+15b-100=0

b=-15+-√225+400/2

b=-15+-25/2

b=10/2=5 other neglected as its negative

hence l=20m

hence area =20*5=100m^2

hence cost of fencing =100*5=500rupees