Question

Surface area of solid cylinder of radius 2.0cm and height acm is equal to 1.5*104mm2. Here a refers

Answer 1

Answer:

$a = - \frac{4127}{4400}$

Explanation:

Surface Area of cylinder

$= 2\pi r (r + h)$

Where 'r' = radius of the base circles and 'h' = height of cylinder

Putting the values, we get

$= 2\pi 2 (2 + a) = 1.56$

$= 4\pi (2 + a) = 1.56$

$= 8\pi + 8\pi a = 1.56$

$= 8\pi (1 + a) = 1.56$

$= \frac{176}{7} (1 + a) = 1.56$

$= 1 + a = \frac{156}{100} *\frac{7}{176}$

$= 1 + a = \frac{39}{100} *\frac{7}{44}$

$= 1 + a = \frac{273}{4400}$

$= a = \frac{273}{4400} - 1$

$= a = - \frac{4127}{4400}$

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