Question

The area of a rectangle is the product of width and length. If a rectangle has length 12m(sqrt21m) and width (sqrt16m) , which of the following is the area of the rectangle?

Answer 1

Area of rectangle= Width x Length/ Length x Width (it's interchangeable and the answer will still remain the same. e.g. 3 x 4=12 and 4 x 3=12)

\[12\sqrt{21} \times \sqrt {16}\]

If this is how the numbers look like, then all you have to do from here is solve the equation. Do you need help with that?

Answer 2

yah i need help with that

Answer 3

144

Answer 4

and the square root of 16?

Answer 5

4

Answer 6

Yup!

Now, your equation would become

\[12\sqrt{21} \times 4\]

now, what is 4 x 12?

Answer 7

48

Answer 8

Right! :)

Now, you have...

\[48\sqrt{21}\]

as your answer. (If you want a decimal, then I'd use the 144. However, I do not think you need to give a decimal answer so I'm leaving it in radical form.)

Answer 9

Do you kind of get me? :/

Answer 10

yah so that is the answer there is still work to be done

Answer 11

that should be the answer unless your question asks to give the answer as a decimal.

Answer 12

no decimal
Thank You So Much!!! :)

Answer 13

You're welcome! :) All the best!