A driver travels the first 240 km of a 600-km journey at an average speed of 60 km/h. If the time taken for the whole journey is
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s = 3x - 15 is the required expression for perimeter of table top
Perimeter of square tabletop is 240 cm
<em><u>Solution:</u></em>
A square tabletop has an area given as:
The dimensions of the tabletop have the form cx - di ,where cand d are whole numbers
To find perimeter of tabletop when x = 25 centimeters
Let us first find the length of each side of square
<em><u>Given area is:</u></em>
We know that,
Therefore,
Taking square root on both sides,
s = 3x - 15
The above expression is the required expression for perimeter of table top
<em><u>To find perimeter when x = 25 centimeter</u></em>
<em><u>The perimeter of square is given as:</u></em>
perimeter = 4(3x - 15)
Substitute x = 25
perimeter = 4(3(25) - 15)
perimeter = 4(60) = 240
Therefore perimeter of square tabletop is 240 cm