Question

The perimeter of a rectangular field is 300 m and its length is 90 m. Find :
(1) its breadth
(ii) its area
(iii) cost of ploughing the field at the rate of 80 per square metrsexsesrxsexsexsexsexsexwe​

Answer 1

Step-by-step explanation:

perimeter = 300m

$perimeter = 2{l + 2b}$

1. 300 = 2×90 +2×b

300 = 180 + 2b

120÷ 2 = b

b = 60m

breadth = 60m

2.

$area \: = l \times b$

area = 90×60

area = 5400

3.cost = area × rate per sq m

cost = 5400 × 80

cost = 43200

Answer 2

Step-by-step explanation:

perimeter of rectangle = l+b+l+b

300= 90+b+90+b

300-180=2b

120=2b

B= 120÷2

B=60

Area of rectangle= l×b

= 90×60= 5400sqm

Cost for ploughing = 5400× 80=432000

1)60

2) 5400sqm

3)432000