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Sindrei [870]
3 years ago
10

can somebody please go look at my previous math question, it's the fifth time I've posted it and I'm getting really frustrated.

Can someone just please help me out​
English
1 answer:
madreJ [45]3 years ago
4 0

Answer: See explanation

Explanation:

I've attached the mathematics question that you posted.

The first picture is a cone. The surface area of a cone is:

= πrl + πr²

where,

π = 3.14

r = diameter/2 = 9m/2 = 4.5m

l = 13m

Surface area = πrl + πr²

= (3.14 × 4.5 × 13) + (3.14 × 4.5²)

= 183.69 + 63.585

= 247.275m²

The second picture is a hemisphere.

Volume of a hemisphere = 2/3πr³

= 2/3 × 3.14 × 3³

= 2/3 × 3.14 × 27

= 56.52km³

Surface area of a hemisphere = 3πr²

= 3 × 3.14 × 3²

= 3 × 3.14 × 9

= 84.78km²

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