Question

Find the perimeter of a rectangular field whose length is 4 times its breadth and which has an area equal to 10000 cm square also find the cost of fencing the field at the rate of rupees 2.5 per cm​

Answer 1

Answer:

ans is 50

area of rectangle= l×b

length and breadth is =x

then 4x×x= 10000 then

length = 200

breadth = 50

Answer 2

Answer:

perimeter=500 cm

cost=1250 rupees

Step-by-step explanation:

p=2(l+b)

length=4b

perimeter=10b

area=l*b=10000

4b²=10000

b²=2500

b=50

perimeter=500cm

cost of fencing = 500*2.5

                         =1250 rupees