# Algebra

A rectangle has a width of 2(square root of 5)and an area of 50 cm^2. Find the length of the rectangle. Does anyone know how to explain this problem?

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1. L x W = Area
2√5L = 50
L = 50/(2√5)
x = appr. 11.2 cm

(check: 11.2 x 2√5 = 50.08)

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posted by Reiny
2. meant to say

L = appr. 11.2 cm

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posted by Reiny
3. The back of my book says the answer is 5(square root of 5) cm

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posted by Casey
4. Find 3 different composite numbers whose GCF (Greatest Common Factor) is 1? (Hint- A composite number factors other than 1 and itself.)

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posted by Sonic
5. 5√5 is appr 11.2 like I had

multiply top and bottom by √5 to get
25(√5)/(√5*√5)
= 25√5/5
= 5√5

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posted by Reiny
6. that helped me in more ways than one. THANKS.

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posted by Person

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