Math, asked by kelvinteofilo13579, 3 months ago

ana is instructed to make a garden plot which has an area less than 18ft2 the length should be at 3ft longer than its width what are the possible dimensions of the box 1. how would you represent the width of the garden plot. 1) how would you represent the width of the garden plot 2)what would be the mathematical sentence 3)what are the possible dimensions of the garden plot

Answers

Answered by amitnrw
25

Given : a garden plot which has an area less than 18 ft²

length should be at 3ft longer than its width

To Find :  what are the possible dimensions

Solution:

Let say Width  = w ft

Length = w  + 3 ft

Area = Length x Width  

=> area = (w + 3) w

=> area  = w² + 3w

w² + 3w  <  18

=>  w² + 3w - 18 <  0

=> w² + 6w - 3w - 18 < 0

=> w(w + 6) - 3(w + 6) < 0

=> (w - 3)(w  + 6) < 0

=>  - 6 < w < 3

but width can not be negative

Hence  0 < w < 3

width of the garden plot.  0 < w < 3

width = 1  ft    Length = 4 ft   Area = 4 ft²

width = 2  ft    Length = 5 ft   Area = 10 ft²

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