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## Sagot :

width - b

Area= a*b

320=ab

b=4/5a

320=[tex] 4a^{2}/5[/tex]

400=[tex] a^{2} [/tex]

a=[tex] \sqrt{400} [/tex]

a=20

b=16

**Answer:**

Read below.

**Step-by-step explanation:**

A=l*w

320=l*(4/5)l

320=(4/5)(l2)

(5/4)(320)=(5/4)(4/5)(l2)

5(80)=l2 (320/4=80)

400=l2

√400=√l2

20=l

w=(4/5)(20)

w=4*4 (20/5=4)

w=16

length=20 feet

width=16 feet

If you don't understand square roots, maybe you understand prime factorization.

320=2*2*2*2*2*2*5=(2*2*2*2)*(2*2*5)=16*20 and 16 is 4/5 of 20

If you don't understand prime factorization you can use trial and error.

2*160

4*80

5*64

8*40

10*32

16*20 answer, because 16 is 4/5 or 0.8 times 20