One of the diagonals of a rectangle a 20 cm long. The difference between its length and its width is 4 cm. Find the area of the rectangle?

A = 192 cm²

Step-by-step explanation:

Given that,

The length of the diagonal of a rectangle is 20 cm.

The difference between its length and its width is 4 cm.

Let the length is l and width is b.

ATQ,

l-b = 4 ...(1)

Let x is the diagonal of the rectangle such that,

or

....(2)

Now we need to solve equation (1) and (2).

Squaring equation (1) :

Put equation (2) in above equation.

Since, the area of the rectangle, A = lb

A = 192 cm²

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step-by-step explanation: