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aliina [53]
4 years ago
7

A sphere has a surface area of 200 square centimeters. Which choice is the best approximation of its diameter? Use 3.14 to appro

ximate pi.
Mathematics
2 answers:
masha68 [24]4 years ago
8 0
SA = surface area of the sphere
SA = 4*pi*r^2
200 = 4*pi*r^2
200 = 4*3.14*r^2
200 = 12.56*r^2
12.56*r^2 = 200
r^2 = 200/12.56
r^2 = 15.9235668789809
r = sqrt(15.9235668789809)
r = 3.99043442233811

The radius is r = 3.99043442233811
so the diameter is 
d = 2*r 
d = 2*3.99043442233811
d = 7.98086884467621

Answer: 7.98086884467621
Round this however you need to

Nataliya [291]4 years ago
4 0

Answer:

11.29 cm is the diameter.

Step-by-step explanation:

A sphere is given with a surface area of 200 square cm.

We have to calculate the diameter of this sphere.

Surface area of sphere = 4πr² = 4×3.14×r² = 400

r² = 400/(4×3.14) = 100/3.14

r = √(100/3.14) = 10/√3.14 = 10/1.772 = 5.64 cm.

Therefore diameter = 2×r = 2×5.64 = 11.29 cm. is the answer.

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Use Euclid's division algorithm to find the HCF of 441, 567, 693
Illusion [34]
Let a = 693, b = 567 and c = 441

Now first we will find HCF of 693 and 567 by using Euclid’s division algorithm as under

693 = 567 x 1 + 126
567 = 126 x 4 + 63
126 = 63 x 2 + 0
Hence, HCF of 693 and 567 is 63

Now we will find HCF of third number i.e., 441 with 63 So by Euclid’s division alogorithm for 441 and 63

441 = 63 x 7+0
=> HCF of 441 and 63 is 63.

Hence, HCF of 441, 567 and 693 is 63.
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Answer:

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