MelaniaFlocco533
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An artificial lake is in the shape of a rectangle and has an area of 9/10 square mile. The width of the lake is 1/5 the length of the lake. What are the dimensions of the lake?

Sagot :

iGreen
Area of a rectangle:

A = lw

9/10 = 1/5l

Divide 1/5 to both sides:

l = 9/10 / 1/5

Flip the 2nd fraction and multiply:

l = 9/10 * 5/1 = 45/10 = 4.5

So:

Length = 4.5 or 4 1/2
Width = 0.2 or 1/5
Area = 0.9 or 9/10
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