Question

A rectangular garden is of length 145 m
and breadth 115 m. What is the
cost of fencing the garden at 20
per metre?​

Answer 1

I hope it helps you

Answer 2

Answer:

Let the length of the rectangular garden be '4x'.

Then, breadth = 3x

• Now, we know that area of a rectangle = Length × breadth

• So, area of the rectangular garden

= 4x × 3x

= 12x²

• But, given area of the garden = 1200 m²

=> 12x² = 1200

=> x² = 1200/12

=> x² = 100

=> x = √100

=> x = √10 × 10

=> x = 10

• Hence, the length of the rectangular garden

= 4x

= 4 × 10

= 40 m

• And, the breadth of the rectangular garden

= 3x

= 3 × 10

= 30 m

• Now, perimeter of the rectangular garden

= 2 (length + breadth)

= 2 (40 + 30)

= 2 × 70

= 140 m

• Now, cost of fencing 1 m = 7.50 Rs.

So, cost of fencing 140 m

= 140 × 7.5

= 1050 Rs.