Question

the total cost of producing a rectangular field is Rupees 2.25 per square metre is rupees 45000 if the breadth of the field is 5 M then find the cost of fencing the field at rupees 7.50 per metre

Answer 1

total area = 45000/2.25
= 20000 m2
area = l×b
20000= 5×l
l=4000 m
surface area = 2(l+b)
= 2(5+4000)
=8010 m
total cost for fencing= 8010× 7.50
=60075 rs.

Answer 2

45000/2.25= 20000^2m is area of rectangle
now
area of rectangle =breadth × length so
20000=br×5
br = 4000
now
perimeter of rectangle = 2(br+ length)
=2(4005) =8010 m
cost of fancing is 8010×7.50=60075