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Alex_Xolod [135]
2 years ago
14

Please help me, I know it’s not the first one but I think it’s the last one. Can somebody please confirm or deny?

Mathematics
1 answer:
GaryK [48]2 years ago
7 0

Answer:

B. 2.2π m² : 3.2π m²

Step-by-step explanation:

Given:

Slant height (l) = 2.2 m

Diameter (d) = 2 m

Radius (r) = ½(2) = 1 m

Required:

Lateral area and surface area

Solution:

✔️Formula for lateral area of a cone = πrl

Plug in the values

Lateral area of the cone = π*1*2.2

Lateral area = 2.2π m²

✔️ Formula for surface area of a cone = πr(l + r)

Plug in the values

Surface area of the cone = π*1(2.2 + 1)

Surface area = π(3.2)

Surface area = 3.2π m²

The answer would therefore be:

2.2π m² : 3.2π m²

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3 years ago
A) 120 is what percentage of 30
scZoUnD [109]

Answer:

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b )  n = 25

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Is means equals, of means multiply and percents need to be changed to decimals.

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b) 30 is 120% of what number

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