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The length of a rectangle is 5mm more than twice the width. if the area is 168 square mm, fine the dimensions of the rectangle.
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The length of a rectangle is 5mm more than twice the width. if the area is 168 square mm, fine the dimensions of the rectangle.
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Jun 18, 2018
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The length of a rectangle is 5mm more than twice the width. if the area is 168 square mm, fine the dimensions of the rectangle.
Mathematics
high-school
Ajay Kelkar
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Ajay Kelkar
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let the width be w and length be l and area be a.
l= 5 + 2w
now, area = length x breadth
=> a = l x b
=> 168 = (5+2w ) x w
=>168 = 5w + 2w^2
=>on factorising, w= 8
hence dimensions : 21 x 8 mm
Kristian Dupont
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Jun 25, 2018
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Kristian Dupont
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