Question

A rectangular field is 45 metres long and its breadth is meters less . Find the cost of turfing it at ₹ 1 per square meter.​

Answer 1

Step-by-step explanation:

length =45m

breadth=l-15=30m

area = lxb=45x30 =1350m sq

1m sq=Rs2

1350m=1350x2=Rs2700

*for the fencing we need perimeter

2(l+b) =2(45+30)=150m

cost of 1m=Rs3.50

cost of 150m=3.50x150=Rs525 ans

Answer 2

Answer:

ANSWER

Let, breadth of rectangle is x, then 5x−4 be the length of the rectangle.

Perimeter of rectangle =2(l+b)

⇒40=2(l+b)

⇒40=2(5x−4+x)

⇒40=12x−8

⇒12x=40+8

⇒12x=48

⇒x=

12

48

⇒x=4

Breadth =4 meters

Hence, length =5×4−4=20−4=16m

Therefore, area of rectangle =lb=16×4=64m

2