Question

The perimeter of a rectangle is 354 km. Its side lengths are 81 km, 81 km, and 96 km. The fourth side length is given as "f" km. What is the value of f?​

Answer 1

The fourth side = f, now let's solve for f

• f + 81 + 81 + 96 = 354

• f + 258 = 354

• f = 354 - 258

• f = 96

value of fourth side = f = 96 km

Answer 2

Answer:

96km

Step-by-step explanation:

We know,

Perimeter of a rectangle

$= 2(l + b)$

Here already the length ( sides ) are provided.

That is 81 km

Now the question is what is the breadth?

In simple words as one of the breadth is 96km so the other one will also be 96 km because 2(l+b) = the perimeter of a rectangle so as there is mentioned 2(l+b) the breadth will be the same i.e 96 km

But let solve it in a better way :)

According to the question

$81 + 81 + 96 + f = 354km$

$= > 256 + f = 354km$

$= > f = (354 - 256)km$

$=>f = 96km$

So your answer is 96 km

Hope it helps you!!

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