Answer:
Step-by-step explanation:
Remember, the formulas for the lateral surface area of a pyramid is 12pl and the total surface area is 12pl+B .
Since the base of a cone is a circle, we substitute 2πr for p and πr2 for B where r is the radius of the base of the cylinder.
So, the formula for the lateral surface area of a right cone is L.S.A=πrl , where l is the slant height of the cone.
Find the lateral surface area of a right cone if the radius is 4 cm and the slant height is 5 cm.
L.S.A=π(4)(5)=20π≈62.82 cm2
Answer:
21.4 units
Step-by-step explanation:
Greater angle: 180 - 80 = 100
diagonal² = 14² + 14² - 2(14)(14)cos(100)
diagonal² = 460.0700856454
diagonal = 21.4492444073
Answer:
208 cm^2
Step-by-step explanation:
(6x8x0.5x2) + (4x8x2) + (10x3) + (8x3) + (10x3) + (4x3) = 208
First we find the mean (or the average)...
average : (82 + 76 + 93 + 82 + 73 + 80 / 6) = 486/6 = 81
now we subtract the average from every data point.....then square the result
82 - 81 = 1.......1^2 = 1
76 - 81 = -5....-5^2 = 25
93 - 81 = 12....12^2 = 144
82 - 81 = 1.......1^2 = 1
73 - 81 = -8.....-8^2 = 64
80 - 81 = -1.....-1^2 = 1
now we find the mean (or average) of those numbers
(1 + 25 + 144 + 1 + 64 + 1) / 6 = 236/6 = 39.33
that is ur variance....to find the standard deviation, take the square root of ur variance.....
square root 39.33 = 6.27 <==
Answer:
i think B would be accurate
Step-by-step explanation:
