Question

The length and perimeter of a rectangular field are 60m and 18 decameter, respectively. find the breadth of the field

Answer 1

Answer:

30m

Step-by-step explanation:

breadth= 30m

by perimeter formula

Answer 2

Answer:

$\large\bold\red{30\;m}$

Step-by-step explanation:

Given that,

A rectangular field having,

• Length, l = 60 m

and

• Perimeter, P = 18 decameter

But,

We know that,

• 1 decameter = 10 m

Therefore,

We get,

• Perimeter, P = (18×10) m = 180 m

Now,

Let the breadth of rectangular field be 'b' metre.

And,

We know that,

• P = 2 ( l + b )

Therefore,

We get,

$= > 180 = 2(60 + b) \\ \\ = > 60 + b = \frac{180}{2} \\ \\ = > 60 + b = 90 \\ \\ = > b = 90 - 60 \\ \\ = > b = 30 \: m$

Hence,

Breadth of the field is 30 m.