Rounded to the nearest foot , how many feet of fencing is required to surround the entire ring with a fence .
the length of the rectangle is 42 feet
the length of a side of one semicircle is 28 feet .
2007-06-18 13:44:28 · 3 answers · asked by ♥ ahhfxckit 3 in Education & Reference ➔ Homework Help
140 ft.
Two semicircles plus two lengths of the rectangle sides = 28 + 28 + 42 + 42 = 140 ft.
If the description is meant to mean the 28 ft is the diameter (straight side) of the semicircle, then the round edge of the semicircles will be twice the semicircles, or the circle with a diameter of 28: pi * 28 ft = 28pi ft. So the overall length of fence needed would be (84 + 28pi) ft = (84 + 87.96) ft = 172 ft (to the nearest foot).
2007-06-18 13:51:26 · answer #1 · answered by roynburton 5 · 0⤊ 0⤋
The question is ambiguous. If the curved length of one semicircle is 28 feet, then:
42 + 42 + 28 + 28 = 140 feet
But if the length of the short side of the rectangle is 28, then:
42 + 42 + 28pi = 171.96 feet
2007-06-18 13:48:47 · answer #2 · answered by jsardi56 7 · 0⤊ 0⤋
42+42+ (pi x 28)= 171.92
2007-06-18 13:50:20 · answer #3 · answered by markwd21 2 · 0⤊ 0⤋