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lilavasa [31]
3 years ago
13

I need help with this problem. How do I do it?

Mathematics
1 answer:
Anna11 [10]3 years ago
8 0

Answer:

20

Step-by-step explanation:

For the area of a rectangle we use A = L* W

We know area or A = 420

and we know length or L = 21

Now we need to find the width or W

(420) = (21) * W

Divide both sides of the equation by 21 to isolate the variable.

That leaves us with:

W = 20

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