81. The area of a rectangular garden is 48 sq. A. How much fencing will be needed to enclose it if its length is 2 ft longer than its width?
82. Find the base of a triangle with an area of 8 sq. m if the altitude of the triangle is 6 m less than the base.
83. Ramon and Sid can build a doghouse in 2 hrs and 24 min. How much time would each require working alone if Ramon can build it in 2 hrs less than Sid can build it?
82. Find the base of a triangle with an area of 8 sq. m if the altitude of the triangle is 6 m less than the base.
83. Ramon and Sid can build a doghouse in 2 hrs and 24 min. How much time would each require working alone if Ramon can build it in 2 hrs less than Sid can build it?
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Answer:
81. 28 feet
Step-by-step explanation:
A = LW = 48 The width is 6 feet
L = W + 2 The length is 8 feet
(W + 2) (W) = 48 The border fence is the perimeter
W2 + 2W – 48 = 0 P = 2L + 2W = 2(8) + 2(6) = 28 feet
(W + 8) (W – 6) = 0