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forsale [732]
3 years ago
11

The radii of two concentric circles are 9cm and 6cm respectively. Find the area of the space between the two circles.

Mathematics
2 answers:
Alenkasestr [34]3 years ago
5 0
Area of a circle = pir^2

Big one= pi(9)^2=254.34
Small one= pi(6)^2=113.04

Now minus small one from big one

254.34-113.04=141.3 cm^2

So your answer is 141.3 cm^2
Novay_Z [31]3 years ago
3 0

Answer:

3

Step-by-step explanation:

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Lionel is buying ice chests to hold 144 bottles of lemonade for a picnic. Each ice chests holds 20 bottles. Lionel calculates th
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Find the total surface area of this cone leave your answer in terms of pi. 12in 15in
ahrayia [7]

Total surface area of a cone is given by,

Surface area of the cone = πrl + B

Here, l = Slant height of the cone

r = radius of the circular base

B = Area of the base

From the picture attached,

Slant height 'l' = 15 in.

Radius of the circular base 'r' = 12 in.

Area of the circular base = πr²

                                          = π(12)²

                                          = 144π in²

By substituting these values in the expression of the surface are,

Total surface area of the cone = π(12)(15) + 144π

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                                                   = 324π in²  

Learn more,

brainly.com/question/14346245

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