The total surface area of a hemisphere with radius 10 cm, taking π = 3.14, is : 1. 942 cm 2 2. 94.2 cm 2 3. 9420 cm 2 4. 1882 cm 2

By formula, Surface area of hemisphere = 3πr 2 Substituting values we get : ⇒ 3 × 3.14 × 10 2 ⇒ 3 × 3.14 × 100 ⇒ 942 cm 2 . Hence, Option 1 is the correct option.

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Mathematics

The total surface area of a hemisphere with radius 10 cm, taking π = 3.14, is :
942 cm²
94.2 cm²
9420 cm²
1882 cm²

Mensuration

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Answer

By formula,

Surface area of hemisphere = 3πr²

Substituting values we get :

⇒ 3 × 3.14 × 10²

⇒ 3 × 3.14 × 100

⇒ 942 cm².

Hence, Option 1 is the correct option.

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Mathematics

The total surface area of a hemisphere with radius 10 cm, taking π = 3.14, is :
942 cm²
94.2 cm²
9420 cm²
1882 cm²

Mensuration

Answer

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The total surface area of a hemisphere with radius 10 cm, taking π = 3.14, is :942 cm294.2 cm29420 cm21882 cm2

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Answer

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The total surface area of a hemisphere with radius 10 cm, taking π = 3.14, is :
942 cm²
94.2 cm²
9420 cm²
1882 cm²

The point A(4, 2) is reflected in x-axis to point A'. Point A' is further reflected in the line y + 2 = 0 to point A". The co-ordinates of the point A" are :
(-4, -2)
(-4, 2)
(4, 2)
(4, -2)

The perimeters of two similar triangles ABC and LMN are 120 cm and 96 cm respectively. If LM = 16 cm, then the length of AB is :
20 cm
16 cm
15 cm
12 cm

The solution for 1 < 3 - 2x ≤ 7; x ∈ N (Natural numbers) is :
{8}
{-1, -2}
{ }
{1}