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Inessa05 [86]
3 years ago
11

Urgent please help..

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
6 0

Answer:

18π

Step-by-step explanation:

Lateral Surface Area = 2πrh

Plug in the numbers into the equation.

but leave the pi

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Answer:

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Step-by-step explanation:

Let the length of the rectangle be x

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Perimeter of a rectangle = 2x + 2y

If the initial perimeter of a rectangle is about 13.9 cm, then;

13.9 = 2x + 2y ..... 1

If when the width is double the perimeter is 17.8cm, then;

17.8 = 2x + 4y ..... 2

Subtract 1 from 2;

13.9 - 17.8 = 2y - 4y

- 3.9 = -2y

y = 3.9/2

y = 1.95 cm

Substitute y = 1.95 into 1 to get x;

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2x = 13.9-3.9

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Hence the dimension of the smaller triangle is 5cm by 1.95cm

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